diff --git a/GPU/GLES/VertexShaderGenerator.cpp b/GPU/GLES/VertexShaderGenerator.cpp
index c140dedac6..7557f177ad 100644
--- a/GPU/GLES/VertexShaderGenerator.cpp
+++ b/GPU/GLES/VertexShaderGenerator.cpp
@@ -399,7 +399,7 @@ void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransf
 		WRITE(p, "\nvec4 depthRoundZVP(vec4 v) {\n");
 		WRITE(p, "  float z = v.z / v.w;\n");
 		WRITE(p, "  z = z * u_depthRange.x + u_depthRange.y;\n");
-		WRITE(p, "  z = floor(z);\n");
+		WRITE(p, "  z = floor(z - 0.5);\n");
 		WRITE(p, "  z = (z - u_depthRange.y) / u_depthRange.x;\n");
 		WRITE(p, "  return vec4(v.x, v.y, z * v.w, v.w);\n");
 		WRITE(p, "}\n\n");