diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index b7983daf4439da37bbbb483c3ca34b22ce6165ba..9061f03be1cbd748399149b085bd1f92f6fd763b 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -283,7 +283,7 @@ INLINE float32 float32_chs(float32 a)
 
 INLINE int float32_is_infinity(float32 a)
 {
-    return (float32_val(a) & 0x7fffffff) == 0x7ff80000;
+    return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 }
 
 INLINE int float32_is_neg(float32 a)