diff --git a/core/src/main/java/org/teavm/backend/javascript/templating/TemplatingAstWriter.java b/core/src/main/java/org/teavm/backend/javascript/templating/TemplatingAstWriter.java
index be2dd7ebe..10bb9a2ed 100644
--- a/core/src/main/java/org/teavm/backend/javascript/templating/TemplatingAstWriter.java
+++ b/core/src/main/java/org/teavm/backend/javascript/templating/TemplatingAstWriter.java
@@ -127,7 +127,7 @@ public class TemplatingAstWriter extends AstWriter {
         if (classInitializerInfo == null || classInitializerInfo.isDynamicInitializer(className)) {
             writer.appendClassInit(className);
         } else {
-            writer.append("(()").ws().append("=>").ws().append("{})");
+            writer.append("(()").sameLineWs().append("=>").ws().append("{})");
         }
         return true;
     }
diff --git a/jso/impl/src/main/java/org/teavm/jso/impl/JSAliasRenderer.java b/jso/impl/src/main/java/org/teavm/jso/impl/JSAliasRenderer.java
index 939dcd27d..00f9a6860 100644
--- a/jso/impl/src/main/java/org/teavm/jso/impl/JSAliasRenderer.java
+++ b/jso/impl/src/main/java/org/teavm/jso/impl/JSAliasRenderer.java
@@ -64,7 +64,7 @@ class JSAliasRenderer implements RendererListener, MethodContributor {
 
         writer.startVariableDeclaration().appendFunction("$rt_jso_marker")
                 .appendGlobal("Symbol").append("('jsoClass')").endDeclaration();
-        writer.append("(()").ws().append("=>").ws().append("{").softNewLine().indent();
+        writer.append("(()").sameLineWs().append("=>").ws().append("{").softNewLine().indent();
         writer.append("let c;").softNewLine();
         var exportedNamesByClass = new HashMap<String, String>();
         for (var className : classSource.getClassNames()) {