diff --git a/src/util/str_util.cpp b/src/util/str_util.cpp
index 259e7900..320cee95 100644
--- a/src/util/str_util.cpp
+++ b/src/util/str_util.cpp
@@ -96,7 +96,7 @@ std::string str_replace(const std::string & in, const std::string & needle, cons
     {
         res += in.substr(pos, p2-pos);
         res += replacement;
-        pos = p2 + replacement.size();
+        pos = p2 + needle.size();
     }
     if (!pos)
     {