diff --git a/src/util/u_process.c b/src/util/u_process.c
index 74c4d10192e..68fda93a53b 100644
--- a/src/util/u_process.c
+++ b/src/util/u_process.c
@@ -187,6 +187,9 @@ util_get_process_exec_path(char* process_path, size_t len)
 
     return 0;
 success:
+   if (r == len)
+      return 0;
+
     process_path[r] = '\0';
     return r;