diff --git a/scheme/base.sld b/scheme/base.sld
index e2a54188..0a63fb55 100644
--- a/scheme/base.sld
+++ b/scheme/base.sld
@@ -978,7 +978,7 @@
           ((string_type *)s)->num_cp = num_cp;
           ((string_type *)s)->str = alloca(sizeof(char) * (len + 1));
         }
-        if (0 && num_cp == 1) { /* Fast path */
+        if (num_cp == 1) { /* Fast path */
           memset(((string_type *)s)->str, ch_buf[0], len);
         } else {
           char *buf = ((string_type *)s)->str;