diff --git a/Makefile b/Makefile
index 021f3eb05..2b3dc5306 100644
--- a/Makefile
+++ b/Makefile
@@ -117,8 +117,12 @@ tmp/font-awesome.css : src/css/font-awesome.css $(imports_font_awesome) $(templa
 tmp/style.css : src/css/style.css $(imports_style) $(template_deps) | tmp
 	$(template) $< $@
 
-tmp/declaration.js : $(wildcard src/*/*.coffee) tools/declare.js | tmp
+.events/declare : $(wildcard src/*/*.coffee) tools/declare.js | .events tmp
 	node tools/declare.js
+	echo -> $@
+
+tmp/declaration.js : .events/declare
+	
 
 tmp/globals.js : src/General/globals.js version.json $(template_deps) | tmp
 	$(template) $< $@
diff --git a/tools/declare.js b/tools/declare.js
index e919adc1d..a91fd3e7c 100644
--- a/tools/declare.js
+++ b/tools/declare.js
@@ -7,4 +7,12 @@ for (var d of fs.readdirSync('src')) {
     if (m) names.push(m[1]);
   }
 }
-fs.writeFileSync('tmp/declaration.js', `var ${names.sort().join(', ')};\n`);
+var decl = `var ${names.sort().join(', ')};\n`;
+var oldDecl;
+try {
+  oldDecl = fs.readFileSync('tmp/declaration.js', 'utf8');
+} catch(err) {
+}
+if (decl !== oldDecl) {
+  fs.writeFileSync('tmp/declaration.js', decl, 'utf8');
+}