diff --git a/drivers/gles3/rasterizer_scene_gles3.cpp b/drivers/gles3/rasterizer_scene_gles3.cpp
index bf765f8dadb..dcb87748d4f 100644
--- a/drivers/gles3/rasterizer_scene_gles3.cpp
+++ b/drivers/gles3/rasterizer_scene_gles3.cpp
@@ -2693,7 +2693,7 @@ void RasterizerSceneGLES3::_setup_directional_light(int p_index, const Transform
 
 			CameraMatrix shadow_mtx = rectm * bias * li->shadow_transform[j].camera * modelview;
 
-			store_camera(shadow_mtx, &ubo_data.shadow_matrix1[16 * j]);
+			store_camera(shadow_mtx, &ubo_data.shadow.matrix[16 * j]);
 
 			ubo_data.light_clamp[0] = atlas_rect.position.x;
 			ubo_data.light_clamp[1] = atlas_rect.position.y;
@@ -2804,7 +2804,7 @@ void RasterizerSceneGLES3::_setup_lights(RID *p_light_cull_result, int p_light_c
 
 					Transform proj = (p_camera_inverse_transform * li->transform).inverse();
 
-					store_transform(proj, ubo_data.shadow_matrix1);
+					store_transform(proj, ubo_data.shadow.matrix1);
 
 					ubo_data.light_params[3] = 1.0; //means it has shadow
 					ubo_data.light_clamp[0] = float(x) / atlas_size;
@@ -2893,7 +2893,7 @@ void RasterizerSceneGLES3::_setup_lights(RID *p_light_cull_result, int p_light_c
 
 					CameraMatrix shadow_mtx = rectm * bias * li->shadow_transform[0].camera * modelview;
 
-					store_camera(shadow_mtx, ubo_data.shadow_matrix1);
+					store_camera(shadow_mtx, ubo_data.shadow.matrix1);
 				}
 
 				li->light_index = state.spot_light_count;
diff --git a/drivers/gles3/rasterizer_scene_gles3.h b/drivers/gles3/rasterizer_scene_gles3.h
index 4866ce6a6f8..a36ca43f95a 100644
--- a/drivers/gles3/rasterizer_scene_gles3.h
+++ b/drivers/gles3/rasterizer_scene_gles3.h
@@ -568,10 +568,15 @@ public:
 		float light_params[4]; //spot attenuation, spot angle, specular, shadow enabled
 		float light_clamp[4];
 		float light_shadow_color_contact[4];
-		float shadow_matrix1[16]; //up to here for spot and omni, rest is for directional
-		float shadow_matrix2[16];
-		float shadow_matrix3[16];
-		float shadow_matrix4[16];
+		union {
+			struct {
+				float matrix1[16]; //up to here for spot and omni, rest is for directional
+				float matrix2[16];
+				float matrix3[16];
+				float matrix4[16];
+			};
+			float matrix[4 * 16];
+		} shadow;
 		float shadow_split_offsets[4];
 	};