diff --git a/core/contour-combiners.cpp b/core/contour-combiners.cpp
index 569362d..d0c5b46 100644
--- a/core/contour-combiners.cpp
+++ b/core/contour-combiners.cpp
@@ -57,7 +57,7 @@ OverlappingContourCombiner<EdgeSelector>::OverlappingContourCombiner(const Shape
 template <class EdgeSelector>
 void OverlappingContourCombiner<EdgeSelector>::reset(const Point2 &p) {
     this->p = p;
-    for (std::vector<EdgeSelector>::iterator contourEdgeSelector = edgeSelectors.begin(); contourEdgeSelector != edgeSelectors.end(); ++contourEdgeSelector)
+    for (typename std::vector<EdgeSelector>::iterator contourEdgeSelector = edgeSelectors.begin(); contourEdgeSelector != edgeSelectors.end(); ++contourEdgeSelector)
         contourEdgeSelector->reset(p);
 }