diff --git a/src/mac/carbon/font.cpp b/src/mac/carbon/font.cpp
index beee3a6e18..e5ebd6dc39 100644
--- a/src/mac/carbon/font.cpp
+++ b/src/mac/carbon/font.cpp
@@ -31,6 +31,7 @@
 #endif
 
 #include <map>
+#include <string>
 
 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)