https://bugs.gentoo.org/937849
--- a/src/FTVectoriser.cpp
+++ b/src/FTVectoriser.cpp
@@ -166,7 +166,7 @@ void FTVectoriser::ProcessContours()
     for(int i = 0; i < ftContourCount; ++i)
     {
         FT_Vector* pointList = &outline.points[startIndex];
-        char* tagList = &outline.tags[startIndex];
+        char* tagList = reinterpret_cast<char*>(&outline.tags[startIndex]);
 
         endIndex = outline.contours[i];
         contourLength =  (endIndex - startIndex) + 1;