diff --git a/Source/Core/VideoCommon/VertexShaderGen.cpp b/Source/Core/VideoCommon/VertexShaderGen.cpp
index c613e237d0..313d1bc5f7 100644
--- a/Source/Core/VideoCommon/VertexShaderGen.cpp
+++ b/Source/Core/VideoCommon/VertexShaderGen.cpp
@@ -227,9 +227,7 @@ static T GenerateVertexShader(API_TYPE api_type)
 				out.Write("coord = float4(tex%d.x, tex%d.y, 1.0, 1.0);\n", texinfo.sourcerow - XF_SRCTEX0_INROW, texinfo.sourcerow - XF_SRCTEX0_INROW);
 			break;
 		}
-		// An input form other than ABC1 or AB11 doesn't exist
-		// But the hardware has it as a two bit field
-		_assert_(texinfo.inputform == XF_TEXINPUT_ABC1 || texinfo.inputform == XF_TEXINPUT_AB11);
+		// Input form of AB11 sets z element to 1.0
 		uid_data->texMtxInfo[i].inputform = xfmem.texMtxInfo[i].inputform;
 		if (texinfo.inputform == XF_TEXINPUT_AB11)
 			out.Write("coord.z = 1.0;\n");
diff --git a/Source/Core/VideoCommon/XFMemory.h b/Source/Core/VideoCommon/XFMemory.h
index 006383df89..99d01f2d45 100644
--- a/Source/Core/VideoCommon/XFMemory.h
+++ b/Source/Core/VideoCommon/XFMemory.h
@@ -178,7 +178,8 @@ union TexMtxInfo
 	{
 		u32 unknown    : 1;
 		u32 projection : 1; // XF_TEXPROJ_X
-		u32 inputform  : 2; // XF_TEXINPUT_X
+		u32 inputform  : 1; // XF_TEXINPUT_X
+		u32 unknown2   : 1;
 		u32 texgentype : 3; // XF_TEXGEN_X
 		u32 sourcerow  : 5; // XF_SRCGEOM_X
 		u32 embosssourceshift : 3; // what generated texcoord to use