diff --git a/lib/roken/roken-common.h b/lib/roken/roken-common.h
index be66046fa..331c08f6a 100644
--- a/lib/roken/roken-common.h
+++ b/lib/roken/roken-common.h
@@ -252,7 +252,7 @@
 
 ROKEN_CPP_START
 
-#ifndef(IRIX4) /* fix for compiler bug */
+#ifndef IRIX4 /* fix for compiler bug */
 #ifdef RETSIGTYPE
 typedef RETSIGTYPE (*SigAction)(int);
 SigAction signal(int iSig, SigAction pAction); /* BSD compatible */