diff --git a/test/unit/math.c b/test/unit/math.c
index ebec77a6..adb72bed 100644
--- a/test/unit/math.c
+++ b/test/unit/math.c
@@ -5,6 +5,10 @@
 
 #include <float.h>
 
+#ifdef __PGI
+#undef INFINITY
+#endif
+
 #ifndef INFINITY
 #define	INFINITY (DBL_MAX + DBL_MAX)
 #endif