diff --git a/common/string.cpp b/common/string.cpp
index c028f6705e..604746fdf9 100644
--- a/common/string.cpp
+++ b/common/string.cpp
@@ -68,6 +68,7 @@ wxString ConvertToNewOverbarNotation( const wxString& aOldStr )
 
                 // Two subsequent tildes mean a tilde.
                 newStr << "~";
+                ++chIt;
                 continue;
             }
             else