diff --git a/Source/Core/VideoCommon/Src/VertexShaderGen.cpp b/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
index 506f44c14f..c8de1e952b 100644
--- a/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
+++ b/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
@@ -194,7 +194,7 @@ const char *GenerateVertexShaderCode(u32 components, API_TYPE ApiType)
 	{
 		WRITE(p, "ATTRIN float4 rawpos; // ATTR%d,\n", SHADER_POSITION_ATTRIB);
 		if (components & VB_HAS_POSMTXIDX)
-			WRITE(p, "ATTRIN float fposmtx; // ATTR%d,\n", SHADER_POSMTX_ATTRIB);
+			WRITE(p, "ATTRIN int posmtx; // ATTR%d,\n", SHADER_POSMTX_ATTRIB);
 		if (components & VB_HAS_NRM0)
 			WRITE(p, "ATTRIN float3 rawnorm0; // ATTR%d,\n", SHADER_NORM0_ATTRIB);
 		if (components & VB_HAS_NRM1)
@@ -275,10 +275,6 @@ const char *GenerateVertexShaderCode(u32 components, API_TYPE ApiType)
 		{
 			WRITE(p, "int posmtx = blend_indices.x * 255.0f;\n");
 		}
-		else
-		{
-			WRITE(p, "int posmtx = int(fposmtx);\n");
-		}
 
 		WRITE(p, "float4 pos = float4(dot(" I_TRANSFORMMATRICES"[posmtx], rawpos), dot(" I_TRANSFORMMATRICES"[posmtx+1], rawpos), dot(" I_TRANSFORMMATRICES"[posmtx+2], rawpos), 1);\n");		
 
diff --git a/Source/Plugins/Plugin_VideoOGL/Src/NativeVertexFormat.cpp b/Source/Plugins/Plugin_VideoOGL/Src/NativeVertexFormat.cpp
index 954a92b126..54f57d1e35 100644
--- a/Source/Plugins/Plugin_VideoOGL/Src/NativeVertexFormat.cpp
+++ b/Source/Plugins/Plugin_VideoOGL/Src/NativeVertexFormat.cpp
@@ -100,7 +100,7 @@ void GLVertexFormat::Initialize(const PortableVertexDeclaration &_vtx_decl)
 
 	if (vtx_decl.posmtx_offset != -1) {
 		glEnableVertexAttribArray(SHADER_POSMTX_ATTRIB);
-		glVertexAttribPointer(SHADER_POSMTX_ATTRIB, 4, GL_UNSIGNED_BYTE, GL_FALSE, vtx_decl.stride, (u8*)NULL + vtx_decl.posmtx_offset);
+		glVertexAttribIPointer(SHADER_POSMTX_ATTRIB, 1, GL_UNSIGNED_BYTE, vtx_decl.stride, (u8*)NULL + vtx_decl.posmtx_offset);
 	}
 
 	vm->m_last_vao = VAO;