diff --git a/swgl/build.rs b/swgl/build.rs
index 62c09ba7f3..cf5a9dd3ed 100644
--- a/swgl/build.rs
+++ b/swgl/build.rs
@@ -112,7 +112,8 @@ fn main() {
 
     let shader_flags =
         ShaderFeatureFlags::GL |
-        ShaderFeatureFlags::DUAL_SOURCE_BLENDING;
+        ShaderFeatureFlags::DUAL_SOURCE_BLENDING |
+        ShaderFeatureFlags::DEBUG;
     let mut shaders: Vec<String> = Vec::new();
     for (name, features) in get_shader_features(shader_flags) {
         shaders.extend(features.iter().map(|f| {
diff --git a/webrender_build/src/shader_features.rs b/webrender_build/src/shader_features.rs
index d92b143724..4e9aa57ab5 100644
--- a/webrender_build/src/shader_features.rs
+++ b/webrender_build/src/shader_features.rs
@@ -15,6 +15,7 @@ bitflags! {
         const PIXEL_LOCAL_STORAGE = 1 << 10;
         const DITHERING = 1 << 11;
         const TEXTURE_EXTERNAL = 1 << 12;
+        const DEBUG = 1 << 13;
     }
 }
 
@@ -200,6 +201,12 @@ pub fn get_shader_features(flags: ShaderFeatureFlags) -> ShaderFeatures {
 
     shaders.insert("ps_clear", vec![base_prim_features.finish()]);
 
+    if flags.contains(ShaderFeatureFlags::DEBUG) {
+        for name in &["debug_color", "debug_font"] {
+            shaders.insert(name, vec![String::new()]);
+        }
+    }
+
     shaders
 }