diff --git a/src/rwbase.cpp b/src/rwbase.cpp
index a00c084..cd1ebc8 100644
--- a/src/rwbase.cpp
+++ b/src/rwbase.cpp
@@ -78,6 +78,8 @@ strncmp_ci(const char *s1, const char *s2, int n)
 		c2 = tolower(*s2);
 		if(c1 != c2)
 			return c1 - c2;
+		if(c1 == '\0')
+			return 0;
 		s1++;
 		s2++;
 	}