diff --git a/drivers/gles3/shaders/canvas.glsl b/drivers/gles3/shaders/canvas.glsl
index 5e7fb3b33898..687a1c137c73 100644
--- a/drivers/gles3/shaders/canvas.glsl
+++ b/drivers/gles3/shaders/canvas.glsl
@@ -452,7 +452,7 @@ vec3 light_normal_compute(vec3 light_vec, vec3 normal, vec3 base_color, vec3 lig
 vec4 light_shadow_compute(uint light_base, vec4 light_color, vec4 shadow_uv
 #ifdef LIGHT_CODE_USED
 		,
-		vec3 shadow_modulate
+		vec4 shadow_modulate
 #endif
 ) {
 	float shadow = 0.0;
@@ -488,11 +488,12 @@ vec4 light_shadow_compute(uint light_base, vec4 light_color, vec4 shadow_uv
 
 	vec4 shadow_color = godot_unpackUnorm4x8(light_array[light_base].shadow_color);
 #ifdef LIGHT_CODE_USED
-	shadow_color.rgb *= shadow_modulate;
+	shadow_color.rgb *= shadow_modulate.rgb;
+	shadow *= shadow_modulate.a;
 #endif
 
 	shadow_color.a *= light_color.a; //respect light alpha
-
+	
 	return mix(light_color, shadow_color, shadow);
 }
 
@@ -736,7 +737,7 @@ void main() {
 			light_color = light_shadow_compute(light_base, light_color, shadow_uv
 #ifdef LIGHT_CODE_USED
 					,
-					shadow_modulate.rgb
+					shadow_modulate
 #endif
 			);
 		}
@@ -838,7 +839,7 @@ void main() {
 			light_color = light_shadow_compute(light_base, light_color, shadow_uv
 #ifdef LIGHT_CODE_USED
 					,
-					shadow_modulate.rgb
+					shadow_modulate
 #endif
 			);
 		}
diff --git a/servers/rendering/renderer_rd/shaders/canvas.glsl b/servers/rendering/renderer_rd/shaders/canvas.glsl
index dafcce37adf5..b358c89fed41 100644
--- a/servers/rendering/renderer_rd/shaders/canvas.glsl
+++ b/servers/rendering/renderer_rd/shaders/canvas.glsl
@@ -393,7 +393,7 @@ vec3 light_normal_compute(vec3 light_vec, vec3 normal, vec3 base_color, vec3 lig
 vec4 light_shadow_compute(uint light_base, vec4 light_color, vec4 shadow_uv
 #ifdef LIGHT_CODE_USED
 		,
-		vec3 shadow_modulate
+		vec4 shadow_modulate
 #endif
 ) {
 	float shadow;
@@ -431,11 +431,12 @@ vec4 light_shadow_compute(uint light_base, vec4 light_color, vec4 shadow_uv
 
 	vec4 shadow_color = unpackUnorm4x8(light_array.data[light_base].shadow_color);
 #ifdef LIGHT_CODE_USED
-	shadow_color.rgb *= shadow_modulate;
+	shadow_color.rgb *= shadow_modulate.rgb;
+	shadow *= shadow_modulate.a;
 #endif
 
 	shadow_color.a *= light_color.a; //respect light alpha
-
+	
 	return mix(light_color, shadow_color, shadow);
 }
 
@@ -643,8 +644,8 @@ void main() {
 
 				light_color = light_shadow_compute(light_base, light_color, shadow_uv
 #ifdef LIGHT_CODE_USED
-						,
-						shadow_modulate.rgb
+					,
+					shadow_modulate
 #endif
 				);
 			}
@@ -730,8 +731,8 @@ void main() {
 
 				light_color = light_shadow_compute(light_base, light_color, shadow_uv
 #ifdef LIGHT_CODE_USED
-						,
-						shadow_modulate.rgb
+					,
+					shadow_modulate
 #endif
 				);
 			}