diff --git a/source/common/rendering/hwrenderer/data/hw_renderstate.h b/source/common/rendering/hwrenderer/data/hw_renderstate.h
index 9cf1015d2..54aab25f8 100644
--- a/source/common/rendering/hwrenderer/data/hw_renderstate.h
+++ b/source/common/rendering/hwrenderer/data/hw_renderstate.h
@@ -200,9 +200,8 @@ struct StreamData
 	FVector4 uSplitBottomPlane;
 
 	FVector4 uDetailParms;
-#ifdef NPOT_EMULATION
-	FVector2 uNpotEmulation;
-#endif
+	FVector4 uNpotEmulation;
+	FVector4 padding1, padding2, padding3;
 };
 
 class FRenderState
@@ -295,7 +294,7 @@ public:
 		mStreamData.uDynLightColor = { 0.0f, 0.0f, 0.0f, 1.0f };
 		mStreamData.uDetailParms = { 0.0f, 0.0f, 0.0f, 0.0f };
 #ifdef NPOT_EMULATION
-		mStreamData.uNpotEmulation = { 0,0 };
+		mStreamData.uNpotEmulation = { 0,0,0,0 };
 #endif
 		mModelMatrix.loadIdentity();
 		mTextureMatrix.loadIdentity();
@@ -490,7 +489,7 @@ public:
 	void SetNpotEmulation(float factor, float offset)
 	{
 #ifdef NPOT_EMULATION
-		mStreamData.uNpotEmulation = { offset, factor };
+		mStreamData.uNpotEmulation = { offset, factor, 0, 0 };
 #endif
 	}
 
diff --git a/source/common/rendering/vulkan/shaders/vk_shader.cpp b/source/common/rendering/vulkan/shaders/vk_shader.cpp
index 0456061fb..acb15dd47 100644
--- a/source/common/rendering/vulkan/shaders/vk_shader.cpp
+++ b/source/common/rendering/vulkan/shaders/vk_shader.cpp
@@ -163,9 +163,8 @@ static const char *shaderBindings = R"(
 		vec4 uSplitBottomPlane;
 
 		vec4 uDetailParms;
-		#ifdef NPOT_EMULATION
-		vec2 uNpotEmulation;
-		#endif
+		vec4 uNpotEmulation;
+		vec4 padding1, padding2, padding3;
 	};
 
 	layout(set = 0, binding = 3, std140) uniform StreamUBO {