diff --git a/Source/Core/VideoBackends/OGL/Render.cpp b/Source/Core/VideoBackends/OGL/Render.cpp
index 6efdd7fd40..8a1a6b8a35 100644
--- a/Source/Core/VideoBackends/OGL/Render.cpp
+++ b/Source/Core/VideoBackends/OGL/Render.cpp
@@ -1197,7 +1197,7 @@ void Renderer::SetViewport()
 	float Y = EFBToScaledYf((float)EFB_HEIGHT - xfmem.viewport.yOrig + xfmem.viewport.ht + (float)scissorYOff);
 	float Width = EFBToScaledXf(2.0f * xfmem.viewport.wd);
 	float Height = EFBToScaledYf(-2.0f * xfmem.viewport.ht);
-	float GLNear = MathUtil::Clamp<float>(xfmem.viewport.farZ - MathUtil::Clamp<float>(xfmem.viewport.zRange, 0.0f, 16777215.0f), 0.0f, 16777215.0f) / 16777216.0f;
+	float GLNear = MathUtil::Clamp<float>(xfmem.viewport.farZ - MathUtil::Clamp<float>(xfmem.viewport.zRange, -16777215.0f, 16777215.0f), 0.0f, 16777215.0f) / 16777216.0f;
 	float GLFar = MathUtil::Clamp<float>(xfmem.viewport.farZ, 0.0f, 16777215.0f) / 16777216.0f;
 	if (Width < 0)
 	{