diff --git a/src/common/string.cpp b/src/common/string.cpp
index d8a1d812b2..80cf48d162 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -1651,7 +1651,7 @@ void wxString::swap(wxString& str)
     // ref count always stays positive
     wxString tmp = str;
     str = *this;
-    *this = str;
+    *this = tmp;
 }
 
 wxString& wxString::insert(size_t nPos, const wxString& str)