diff --git a/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
index 20b080da4d8b..4a630b0b0a0e 100644
--- a/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
+++ b/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
@@ -352,7 +352,7 @@ void vertex_shader(vec3 vertex_input,
 	}
 
 #ifdef OVERRIDE_POSITION
-	vec4 position;
+	vec4 position = vec4(1.0);
 #endif
 
 #ifdef USE_MULTIVIEW
diff --git a/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
index a64b2e10ea08..530a7a37db87 100644
--- a/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
@@ -352,7 +352,7 @@ void main() {
 	}
 
 #ifdef OVERRIDE_POSITION
-	vec4 position;
+	vec4 position = vec4(1.0);
 #endif
 
 #ifdef USE_MULTIVIEW