diff --git a/GPU/Directx9/ShaderManagerDX9.cpp b/GPU/Directx9/ShaderManagerDX9.cpp
index fe60271b5c..b7c988a75c 100644
--- a/GPU/Directx9/ShaderManagerDX9.cpp
+++ b/GPU/Directx9/ShaderManagerDX9.cpp
@@ -260,7 +260,7 @@ static void ConvertProjMatrixToD3D(Matrix4x4 &in, bool invertedX, bool invertedY
 	if (invertedY)
 		yoff = -yoff;
 
-	const Vec3 trans(xoff, yoff, gstate_c.vpZOffset + 0.5f);
+	const Vec3 trans(xoff, yoff, gstate_c.vpZOffset * 0.5f + 0.5f);
 	const Vec3 scale(gstate_c.vpWidthScale, gstate_c.vpHeightScale, gstate_c.vpDepthScale * 0.5f);
 	in.translateAndScale(trans, scale);
 }
diff --git a/GPU/GLES/ShaderManager.cpp b/GPU/GLES/ShaderManager.cpp
index 7b327932a0..6e8c1dc3d7 100644
--- a/GPU/GLES/ShaderManager.cpp
+++ b/GPU/GLES/ShaderManager.cpp
@@ -378,7 +378,7 @@ static inline void ScaleProjMatrix(Matrix4x4 &in) {
 		// GL upside down is a pain as usual.
 		yOffset = -yOffset;
 	}
-	const Vec3 trans(gstate_c.vpXOffset, yOffset, gstate_c.vpZOffset * 2.0f);
+	const Vec3 trans(gstate_c.vpXOffset, yOffset, gstate_c.vpZOffset);
 	const Vec3 scale(gstate_c.vpWidthScale, gstate_c.vpHeightScale, gstate_c.vpDepthScale);
 	in.translateAndScale(trans, scale);
 }