diff --git a/src/compiler/compile/Component.ts b/src/compiler/compile/Component.ts
index ef440d5560..4d4cf909fd 100644
--- a/src/compiler/compile/Component.ts
+++ b/src/compiler/compile/Component.ts
@@ -343,10 +343,10 @@ export default class Component {
 			css = compile_options.customElement
 				? { code: null, map: null }
 				: result.css;
-				
-			const jsSourcemapEnabled = check_enable_sourcemap(compile_options.enableSourcemap, 'js');
 
-			if (!jsSourcemapEnabled) {
+			const js_sourcemap_enabled = check_enable_sourcemap(compile_options.enableSourcemap, 'js');
+
+			if (!js_sourcemap_enabled) {
 				js = print(program);
 				js.map = null;
 			} else {
diff --git a/src/compiler/compile/render_dom/index.ts b/src/compiler/compile/render_dom/index.ts
index 01110b95a5..89af0c297c 100644
--- a/src/compiler/compile/render_dom/index.ts
+++ b/src/compiler/compile/render_dom/index.ts
@@ -34,16 +34,16 @@ export default function dom(
 	}
 
 	const css = component.stylesheet.render(options.filename, !options.customElement);
-	
-	const cssSourcemapEnabled = check_enable_sourcemap(options.enableSourcemap, 'css');
 
-	if (cssSourcemapEnabled) {
+	const css_sourcemap_enabled = check_enable_sourcemap(options.enableSourcemap, 'css');
+
+	if (css_sourcemap_enabled) {
 		css.map = apply_preprocessor_sourcemap(options.filename, css.map, options.sourcemap as string | RawSourceMap | DecodedSourceMap);
 	} else {
 		css.map = null;
 	}
 
-	const styles = cssSourcemapEnabled && component.stylesheet.has_styles && options.dev
+	const styles = css_sourcemap_enabled && component.stylesheet.has_styles && options.dev
 		? `${css.code}\n/*# sourceMappingURL=${css.map.toUrl()} */`
 		: css.code;
 
@@ -528,7 +528,7 @@ export default function dom(
 				constructor(options) {
 					super();
 
-					${css.code && b`this.shadowRoot.innerHTML = \`<style>${css.code.replace(/\\/g, '\\\\')}${cssSourcemapEnabled && options.dev ? `\n/*# sourceMappingURL=${css.map.toUrl()} */` : ''}</style>\`;`}
+					${css.code && b`this.shadowRoot.innerHTML = \`<style>${css.code.replace(/\\/g, '\\\\')}${css_sourcemap_enabled && options.dev ? `\n/*# sourceMappingURL=${css.map.toUrl()} */` : ''}</style>\`;`}
 
 					@init(this, { target: this.shadowRoot, props: ${init_props}, customElement: true }, ${definition}, ${has_create_fragment ? 'create_fragment' : 'null'}, ${not_equal}, ${prop_indexes}, null, ${dirty});
 
diff --git a/src/compiler/compile/render_ssr/index.ts b/src/compiler/compile/render_ssr/index.ts
index 696444e68c..9d2c1cc60b 100644
--- a/src/compiler/compile/render_ssr/index.ts
+++ b/src/compiler/compile/render_ssr/index.ts
@@ -201,13 +201,13 @@ export default function ssr(
 		main
 	].filter(Boolean);
 
-	const cssSourcemapEnabled = check_enable_sourcemap(options.enableSourcemap, 'css');
-	
+	const css_sourcemap_enabled = check_enable_sourcemap(options.enableSourcemap, 'css');
+
 	const js = b`
 		${css.code ? b`
 		const #css = {
 			code: "${css.code}",
-			map: ${cssSourcemapEnabled && css.map ? string_literal(css.map.toString()) : 'null'}
+			map: ${css_sourcemap_enabled && css.map ? string_literal(css.map.toString()) : 'null'}
 		};` : null}
 
 		${component.extract_javascript(component.ast.module)}