diff --git a/include/sway/config.h b/include/sway/config.h
index 8dcf6a32..cabc9cf5 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -761,8 +761,6 @@ void translate_keysyms(struct input_config *input_config);
 
 void binding_add_translated(struct sway_binding *binding, list_t *bindings);
 
-int get_config_blur_size();
-
 /* Global config singleton. */
 extern struct sway_config *config;
 
diff --git a/sway/config.c b/sway/config.c
index 43201bf4..85e53679 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -1084,7 +1084,3 @@ void translate_keysyms(struct input_config *input_config) {
 	sway_log(SWAY_DEBUG, "Translated keysyms using config for device '%s'",
 			input_config->identifier);
 }
-
-int get_config_blur_size() {
-	return pow(2, config->blur_params.num_passes) * config->blur_params.radius;
-}
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index a27dc51d..704c3917 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -746,7 +746,8 @@ static void damage_child_views_iterator(struct sway_container *con,
 void output_damage_whole_container(struct sway_output *output,
 		struct sway_container *con) {
 	int shadow_sigma = con->shadow_enabled ? config->shadow_blur_sigma : 0;
-	int blur_size = con->blur_enabled ? get_config_blur_size() : 0;
+	int blur_size = con->blur_enabled ?
+			pow(2, config->blur_params.num_passes) * config->blur_params.radius : 0;
 	// +1 as a margin of error
 	int effect_size = MAX(shadow_sigma, blur_size) + 1;
 
diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index 9903e781..96f68680 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -246,7 +246,6 @@ struct fx_framebuffer *get_main_buffer_blur(struct fx_renderer *renderer, struct
 	pixman_region32_copy(&damage, original_damage);
 	wlr_region_transform(&damage, &damage, transform,
 			monitor_box.width, monitor_box.height);
-	wlr_region_expand(&damage, &damage, get_config_blur_size());
 
 	// Initially blur main_buffer content into the effects_buffers
 	struct fx_framebuffer *current_buffer = &renderer->main_buffer;