diff --git a/ports/SkFontMgr.h b/ports/SkFontMgr.h
index 4e50552..2a4219d 100644
--- a/ports/SkFontMgr.h
+++ b/ports/SkFontMgr.h
@@ -99,7 +99,10 @@
     virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) = 0;
     virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) = 0;
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) = 0;
-    virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], unsigned styleBits) = 0;
+
+    // TODO: make this pure-virtual once all ports know about it
+    virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
+                                               unsigned styleBits) = 0;
 private:
     static SkFontMgr* Factory();    // implemented by porting layer