diff --git a/Source/Core/VideoCommon/GeometryShaderGen.cpp b/Source/Core/VideoCommon/GeometryShaderGen.cpp
index cabdfea191..bcd7758fba 100644
--- a/Source/Core/VideoCommon/GeometryShaderGen.cpp
+++ b/Source/Core/VideoCommon/GeometryShaderGen.cpp
@@ -88,11 +88,11 @@ static inline void GenerateGeometryShader(T& out, u32 primitive_type, API_TYPE A
 			out.Write("#define InstanceID gl_InvocationID\n");
 
 		out.Write("in VertexData {\n");
-		out.Write("\tcentroid VS_OUTPUT o;\n");
+		out.Write("\tcentroid in VS_OUTPUT o;\n");
 		out.Write("} vs[%d];\n", vertex_in);
 
 		out.Write("out VertexData {\n");
-		out.Write("\tcentroid VS_OUTPUT o;\n");
+		out.Write("\tcentroid out VS_OUTPUT o;\n");
 
 		if (g_ActiveConfig.iStereoMode > 0)
 			out.Write("\tflat int layer;\n");
diff --git a/Source/Core/VideoCommon/PixelShaderGen.cpp b/Source/Core/VideoCommon/PixelShaderGen.cpp
index 77f24d115c..4a63c7a977 100644
--- a/Source/Core/VideoCommon/PixelShaderGen.cpp
+++ b/Source/Core/VideoCommon/PixelShaderGen.cpp
@@ -320,7 +320,7 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
 		if (g_ActiveConfig.backend_info.bSupportsGeometryShaders)
 		{
 			out.Write("in VertexData {\n");
-			out.Write("\tcentroid VS_OUTPUT o;\n");
+			out.Write("\tcentroid in VS_OUTPUT o;\n");
 
 			if (g_ActiveConfig.iStereoMode > 0)
 				out.Write("\tflat int layer;\n");
diff --git a/Source/Core/VideoCommon/VertexShaderGen.cpp b/Source/Core/VideoCommon/VertexShaderGen.cpp
index 123f137ff2..f14cd559da 100644
--- a/Source/Core/VideoCommon/VertexShaderGen.cpp
+++ b/Source/Core/VideoCommon/VertexShaderGen.cpp
@@ -75,7 +75,7 @@ static inline void GenerateVertexShader(T& out, u32 components, API_TYPE api_typ
 		if (g_ActiveConfig.backend_info.bSupportsGeometryShaders)
 		{
 			out.Write("out VertexData {\n"
-			          "\tcentroid VS_OUTPUT o;\n"
+			          "\tcentroid out VS_OUTPUT o;\n"
 			          "};\n");
 		}
 		else