diff --git a/tools/shaderc/shaderc.cpp b/tools/shaderc/shaderc.cpp
index a403fa376..74f1b1b75 100644
--- a/tools/shaderc/shaderc.cpp
+++ b/tools/shaderc/shaderc.cpp
@@ -1765,6 +1765,13 @@ namespace bgfx
 //									);
 						}
 
+						if (0 != spirv)
+						{
+							preprocessor.writef(
+								"\tgl_Position.y = -gl_Position.y; \\\n"
+								);
+						}
+
 						preprocessor.writef(
 							"\treturn _varying_"
 							);