diff --git a/src/common/extended.c b/src/common/extended.c
index eb4089e4ab..1e9b9c7b8e 100644
--- a/src/common/extended.c
+++ b/src/common/extended.c
@@ -81,7 +81,7 @@
 # define FloatToUnsigned(f)	((wxUint32)(f))
 # define UnsignedToFloat(u)	((wxFloat64)(u))
 #else /*applec*/
-# define FloatToUnsigned(f)	((wxUint32)((((wxInt32)((f) - 2147483648.0)) + 2147483647L) + 1))
+# define FloatToUnsigned(f)	((wxUint32)(((wxInt32)((f) - 2147483648.0)) + 2147483647L) + 1)
 # define UnsignedToFloat(u)	(((wxFloat64)((wxInt32)((u) - 2147483647L - 1))) + 2147483648.0)
 #endif /*applec*/