diff --git a/desmume/src/OGLRender.cpp b/desmume/src/OGLRender.cpp
index c23afbeab..942ed4668 100755
--- a/desmume/src/OGLRender.cpp
+++ b/desmume/src/OGLRender.cpp
@@ -294,8 +294,7 @@ void main() \n\
 	\n\
 	vtxTexCoord = texScaleMtx * inTexCoord0; \n\
 	vtxColor = vec4(inColor / 63.0, polyAlpha); \n\
-	gl_Position.xyw = inPosition.xyw;\n\
-	gl_Position.z = (inPosition.z + inPosition.w) / 2.0;\n\
+	gl_Position = inPosition;\n\
 } \n\
 "};
 
diff --git a/desmume/src/OGLRender_3_2.cpp b/desmume/src/OGLRender_3_2.cpp
index d6a57a410..36d04fe27 100755
--- a/desmume/src/OGLRender_3_2.cpp
+++ b/desmume/src/OGLRender_3_2.cpp
@@ -146,8 +146,7 @@ void main()\n\
 	\n\
 	vtxTexCoord = texScaleMtx * inTexCoord0;\n\
 	vtxColor = vec4(inColor / 63.0, polyAlpha);\n\
-	gl_Position.xyw = inPosition.xyw;\n\
-	gl_Position.z = (inPosition.z + inPosition.w) / 2.0;\n\
+	gl_Position = inPosition;\n\
 }\n\
 "};