diff --git a/examples/boing.c b/examples/boing.c
index ec118a3a..0cd59cac 100644
--- a/examples/boing.c
+++ b/examples/boing.c
@@ -27,11 +27,6 @@
  * a hidden computer or VCR.
  *****************************************************************************/
 
-#if defined(_MSC_VER)
- // Make MS math.h define M_PI
- #define _USE_MATH_DEFINES
-#endif
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>