diff --git a/mappings/com/mojang/blaze3d/platform/GlStateManager.mapping b/mappings/com/mojang/blaze3d/platform/GlStateManager.mapping
index 1ad1ec5e9a..c73d856c24 100644
--- a/mappings/com/mojang/blaze3d/platform/GlStateManager.mapping
+++ b/mappings/com/mojang/blaze3d/platform/GlStateManager.mapping
@@ -97,6 +97,8 @@ CLASS com/mojang/blaze3d/platform/GlStateManager
 		FIELD c y I
 		FIELD d width I
 		FIELD e height I
+	CLASS com/mojang/blaze3d/platform/GlStateManager$DestFactor DestFactor
+	CLASS com/mojang/blaze3d/platform/GlStateManager$SourceFactor SourceFactor
 	METHOD alphaFunc (IF)V
 		ARG 0 func
 		ARG 1 ref