diff --git a/tools/core/src/main/java/org/teavm/tooling/TeaVMTool.java b/tools/core/src/main/java/org/teavm/tooling/TeaVMTool.java
index f216f8712..26bd7f47a 100644
--- a/tools/core/src/main/java/org/teavm/tooling/TeaVMTool.java
+++ b/tools/core/src/main/java/org/teavm/tooling/TeaVMTool.java
@@ -459,7 +459,7 @@ public class TeaVMTool implements BaseTeaVMTool {
                 case JAVASCRIPT:
                     return "classes.js";
                 case WEBASSEMBLY:
-                    return "classes.wast";
+                    return "classes.wasm";
                 default:
                     return "classes";
             }