diff --git a/plugin/semisync/semisync_source.cc b/plugin/semisync/semisync_source.cc
index 134164ff2db..38093ed6dc1 100644
--- a/plugin/semisync/semisync_source.cc
+++ b/plugin/semisync/semisync_source.cc
@@ -127,7 +127,18 @@ unsigned int ActiveTranx::get_hash_value(const char *log_file_name,
 
 int ActiveTranx::compare(const char *log_file_name1, my_off_t log_file_pos1,
                          const char *log_file_name2, my_off_t log_file_pos2) {
-  int cmp = strcmp(log_file_name1, log_file_name2);
+  int cmp = 0;
+
+  size_t log_file_name1_len = strlen(log_file_name1);
+  size_t log_file_name2_len = strlen(log_file_name2);
+  if (log_file_name1_len != log_file_name2_len) {
+    if (log_file_name1_len > log_file_name2_len)
+      cmp = 1;
+    else if (log_file_name1_len < log_file_name2_len)
+      cmp = -1;
+  } else {
+    cmp = strcmp(log_file_name1, log_file_name2);
+  }
 
   if (cmp != 0) return cmp;