1 files changed, 1 insertions, 1 deletions
diff --git a/Src/string.c b/Src/string.c
index 190ca2d57..2bd1baea3 100644
--- a/Src/string.c
+++ b/Src/string.c
@@ -109,7 +109,7 @@ zhtricat(char const *s1, char const *s2, char const *s3)
 
 /**/
 mod_export char *
-dyncat(char *s1, char *s2)
+dyncat(const char *s1, const char *s2)
 {
     /* This version always uses space from the current heap. */
     char *ptr;