diff --git a/cmdline/support.c b/cmdline/support.c
index 3e2d122e..e6ab9655 100644
--- a/cmdline/support.c
+++ b/cmdline/support.c
@@ -1140,7 +1140,7 @@ char* strtrim(char* str)
 
 	end[0] = 0;
 
-	if (begin != end)
+	if (begin != str)
 		memmove(str, begin, end - begin + 1);
 
 	return str;