diff --git a/src/string.c b/src/string.c
index 921c80f..e63259e 100644
--- a/src/string.c
+++ b/src/string.c
@@ -15,7 +15,7 @@ unsigned int string_trim(char *str) {
   start = 0;
   end = strnlen(str, STR_LEN) - 1;
 
-  if (end == 0) {
+  if (end <= 0) {
     return 0;
   }