diff --git a/src/beesep.c b/src/beesep.c
index e7aaa60..1e13135 100644
--- a/src/beesep.c
+++ b/src/beesep.c
@@ -70,7 +70,7 @@ static void print_escaped(char *s, size_t n)
 
     bee_fprint(stdout, "'");
 
-    while ((c = strchr(s, '\'')) && c - s < n) {
+    while ((c = strchr(s, '\'')) && c < s + n) {
         if (c-s)
             bee_fnprint(stdout, c - s, s);
         bee_fprint(stdout, "'\\''");