1 files changed, 2 insertions, 2 deletions
diff --git a/colorize.c b/colorize.c
index 49879c5..0cf44cb 100644
--- a/colorize.c
+++ b/colorize.c
@@ -1448,8 +1448,8 @@ has_color_name (const char *str, const char *name)
 {
     char *p;
 
-    assert (strlen (str));
-    assert (strlen (name));
+    assert (strlen (str) > 0);
+    assert (strlen (name) > 0);
 
     if (!(*str == *name || *str == toupper (*name)))
       return false;