diff --git a/gfx/thebes/gfxFcPlatformFontList.cpp b/gfx/thebes/gfxFcPlatformFontList.cpp
index 73cd1d6d355..bd09996ce89 100644
--- a/gfx/thebes/gfxFcPlatformFontList.cpp
+++ b/gfx/thebes/gfxFcPlatformFontList.cpp
@@ -17,6 +17,9 @@
 #include "nsILanguageAtomService.h"
 #include "nsUnicodeProperties.h"
 #include "nsUnicodeRange.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsAppDirectoryServiceDefs.h"
 
 #include <fontconfig/fcfreetype.h>
 
diff --git a/gfx/thebes/gfxFcPlatformFontList.h b/gfx/thebes/gfxFcPlatformFontList.h
index b10fe38b925..c30a2f6c9a1 100644
--- a/gfx/thebes/gfxFcPlatformFontList.h
+++ b/gfx/thebes/gfxFcPlatformFontList.h
@@ -161,7 +161,7 @@ protected:
 
 class gfxFontconfigFontFamily : public gfxFontFamily {
 public:
-    gfxFontconfigFontFamily(const nsAString& aName) :
+    explicit gfxFontconfigFontFamily(const nsAString& aName) :
         gfxFontFamily(aName) { }
 
     void FindStyleVariations(FontInfoData *aFontInfoData = nullptr) override;