diff --git a/src/pulsaranimationwidget.cpp b/src/pulsaranimationwidget.cpp
index baaac90bb0396b039405a0489fd2454dc97a2ebc..e58a527b54f397dad5980d5137599a19e261bcbe 100644
--- a/src/pulsaranimationwidget.cpp
+++ b/src/pulsaranimationwidget.cpp
@@ -23,7 +23,6 @@
 // workaround for lack of C99 support in C++
 #define isnan(x) ((x) != (x))
 
-#define GL_PI 3.1415f
 const double PulsarAnimationWidget::deg2rad = PI/180.0;
 
 PulsarAnimationWidget::PulsarAnimationWidget(QWidget *parent) :
@@ -377,7 +376,7 @@ void PulsarAnimationWidget::paintGL()
 
                 // Loop around in a circle and specify even points along the circle
                 // as the vertices of the triangle fan (32 sections)
-                for(angle = 0.0f; angle < (2.0f*GL_PI); angle += (GL_PI/32.0f))
+                for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f))
                 {
                     // Calculate x and y position of the next vertex
                     x = m_pulsarBeamOuterRadius * sin(angle);
@@ -394,7 +393,7 @@ void PulsarAnimationWidget::paintGL()
             {
                 glColor3f(0.66f, 0.66f, 0.0f);
                 glVertex3f(0.0f, 0.0f, m_pulsarBeamLength);
-                for(angle = 0.0f; angle < (2.0f*GL_PI); angle += (GL_PI/32.0f)) {
+                for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f)) {
                     x = m_pulsarBeamInnerRadius * sin(angle);
                     y = m_pulsarBeamInnerRadius * cos(angle);
                     glVertex2f(x, y);
@@ -432,7 +431,7 @@ void PulsarAnimationWidget::paintGL()
 
                 // Loop around in a circle and specify even points along the circle
                 // as the vertices of the triangle fan (32 sections)
-                for(angle = 0.0f; angle < (2.0f*GL_PI); angle += (GL_PI/32.0f))
+                for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f))
                 {
                     // Calculate x and y position of the next vertex
                     x = m_pulsarBeamOuterRadius * sin(angle);
@@ -449,7 +448,7 @@ void PulsarAnimationWidget::paintGL()
             {
                 glColor3f(0.66f, 0.66f, 0.0f);
                 glVertex3f(0.0f, 0.0f, 3.0f);
-                for(angle = 0.0f; angle < (2.0f*GL_PI); angle += (GL_PI/32.0f)) {
+                for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f)) {
                     x = m_pulsarBeamInnerRadius * sin(angle);
                     y = m_pulsarBeamInnerRadius * cos(angle);
                     glVertex2f(x, y);