diff --git a/include/clFFT.h b/include/clFFT.h
index 3fafb66010d508a2e7bf71237377510d7ec4cfc9..9deb2caa321caaa91511ca38a195c34e29811ffa 100644
--- a/include/clFFT.h
+++ b/include/clFFT.h
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       clFFT.h
 //
diff --git a/src/fft_base_kernels.h b/src/fft_base_kernels.h
index 00c5bcf58fb53a51bc5feb72867b0ec6f527ff11..ac883e65fb42600613f43dfb1f8c43c45b73d0fc 100644
--- a/src/fft_base_kernels.h
+++ b/src/fft_base_kernels.h
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       fft_base_kernels.h
 //
diff --git a/src/fft_execute.cpp b/src/fft_execute.cpp
index 2ae30585b2f01167edcc5757f1e2ba37efb346bf..79dbf9658bf0506bb7e45dbb24950339885e5806 100644
--- a/src/fft_execute.cpp
+++ b/src/fft_execute.cpp
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       fft_execute.cpp
 //
diff --git a/src/fft_internal.h b/src/fft_internal.h
index 03d7deba1b3cf102dde9039aad362ac1aba54f78..8178374ecefca39c127d65051825182242026e75 100644
--- a/src/fft_internal.h
+++ b/src/fft_internal.h
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       fft_internal.h
 //
diff --git a/src/fft_kernelstring.cpp b/src/fft_kernelstring.cpp
index 1577c1831cf5fdc5001b187199e0496d66af63e4..85193321f6e9becb7d7b454494de2fec7f99c565 100644
--- a/src/fft_kernelstring.cpp
+++ b/src/fft_kernelstring.cpp
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       fft_kernelstring.cpp
 //
diff --git a/src/fft_setup.cpp b/src/fft_setup.cpp
index 3359b20f3caa3da281555253c021f8fab2ad2e9f..f6f2bbf9f72c974792ee7bac539726fb0d6966cb 100644
--- a/src/fft_setup.cpp
+++ b/src/fft_setup.cpp
@@ -1,4 +1,18 @@
-
+/***************************************************************************
+ *   Copyright (C) 2012 by Oliver Bock,Heinz-Bernd Eggenstein              *
+ *   oliver.bock[AT]aei.mpg.de                                             *
+ *   heinz-bernd.eggenstein[AT]aei.mpg.de                                  *
+ *                                                                         *
+ *   This file is part of libclfft (originally for Einstein@Home)          *
+ *   Derived from clFFT,  (C) Apple, see notice below.                     *
+ *                                                                         *
+ *                                                                         *
+ *   libclfft  is distributed in the hope that it will be useful,          *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See              *
+ *   notice below for more details.                                        *
+ *                                                                         *
+ ***************************************************************************/
 //
 // File:       fft_setup.cpp
 //