diff --git a/drivers/gles3/shader_compiler_gles3.cpp b/drivers/gles3/shader_compiler_gles3.cpp
index 1f3b76f5cd5..d8e322af4e6 100644
--- a/drivers/gles3/shader_compiler_gles3.cpp
+++ b/drivers/gles3/shader_compiler_gles3.cpp
@@ -154,7 +154,8 @@ static String _opstr(SL::Operator p_op) {
 
 static String _mkid(const String &p_id) {
 
-	return "m_" + p_id;
+	String id = "m_" + p_id;
+	return id.replace("__", "_dus_"); //doubleunderscore is reserverd in glsl
 }
 
 static String f2sp0(float p_float) {