diff --git a/drivers/gles3/storage/material_storage.cpp b/drivers/gles3/storage/material_storage.cpp
index aa198269535..8a8d79b3f70 100644
--- a/drivers/gles3/storage/material_storage.cpp
+++ b/drivers/gles3/storage/material_storage.cpp
@@ -1378,6 +1378,7 @@ MaterialStorage::MaterialStorage() {
 		actions.usage_defines["NORMAL"] = "#define NORMAL_USED\n";
 		actions.usage_defines["NORMAL_MAP"] = "#define NORMAL_MAP_USED\n";
 		actions.usage_defines["LIGHT"] = "#define LIGHT_SHADER_CODE_USED\n";
+		actions.usage_defines["SPECULAR_SHININESS"] = "#define SPECULAR_SHININESS_USED\n";
 
 		actions.render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
 		actions.render_mode_defines["unshaded"] = "#define MODE_UNSHADED\n";
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index b87b189d532..4b8debd40ad 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -2431,6 +2431,7 @@ RendererCanvasRenderRD::RendererCanvasRenderRD() {
 		actions.usage_defines["NORMAL"] = "#define NORMAL_USED\n";
 		actions.usage_defines["NORMAL_MAP"] = "#define NORMAL_MAP_USED\n";
 		actions.usage_defines["LIGHT"] = "#define LIGHT_SHADER_CODE_USED\n";
+		actions.usage_defines["SPECULAR_SHININESS"] = "#define SPECULAR_SHININESS_USED\n";
 
 		actions.render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
 		actions.render_mode_defines["unshaded"] = "#define MODE_UNSHADED\n";