diff --git a/src/gtk/filters.cpp b/src/gtk/filters.cpp
index f2f546d8..6cbf96f9 100644
--- a/src/gtk/filters.cpp
+++ b/src/gtk/filters.cpp
@@ -39,8 +39,10 @@ static const astFilters[] =
   { N_("Bilinear Plus"),       2, { BilinearPlus, BilinearPlus32 } },
   { N_("Scanlines"),           2, { Scanlines,    Scanlines32    } },
   { N_("TV Mode"),             2, { ScanlinesTV,  ScanlinesTV32  } },
+  { N_("lq2x"),                2, { lq2x,         lq2x32         } },
   { N_("hq2x"),                2, { hq2x,         hq2x32         } },
-  { N_("lq2x"),                2, { lq2x,         lq2x32         } }
+  { N_("hq3x"),                2, { hq3x16,         hq3x32         } },
+  { N_("hq4x"),                2, { hq4x16,         hq4x32         } }
 };
 
 struct {
diff --git a/src/gtk/filters.h b/src/gtk/filters.h
index b5ec4ff8..f95711d0 100644
--- a/src/gtk/filters.h
+++ b/src/gtk/filters.h
@@ -42,9 +42,11 @@ enum EFilter
   FilterBilinearPlus,
   FilterScanlines,
   FilterScanlinesTV,
-  FilterHq2x,
   FilterLq2x,
-  LastFilter = FilterLq2x
+  FilterHq2x,
+  FilterHq3x,
+  FilterHq4x,
+  LastFilter = FilterHq4x
 };
 
 enum EFilterIB