diff --git a/transpiler/src/main/java/org/jsweet/transpiler/JSweetContext.java b/transpiler/src/main/java/org/jsweet/transpiler/JSweetContext.java
index e4c7a7c5..516c98ee 100644
--- a/transpiler/src/main/java/org/jsweet/transpiler/JSweetContext.java
+++ b/transpiler/src/main/java/org/jsweet/transpiler/JSweetContext.java
@@ -1051,6 +1051,13 @@ public class JSweetContext extends Context {
 		globalsMapping.put(from, to);
 	}
 
+    /**
+     * Clear globals mappings.
+     */
+    public void clearGlobalsMappings() {
+        globalsMapping.clear();;
+    }
+
 	/**
 	 * Returns the TypeScript string for globals mapping.
 	 */
diff --git a/transpiler/src/main/java/org/jsweet/transpiler/JSweetTranspiler.java b/transpiler/src/main/java/org/jsweet/transpiler/JSweetTranspiler.java
index 921b99a0..349b12a4 100644
--- a/transpiler/src/main/java/org/jsweet/transpiler/JSweetTranspiler.java
+++ b/transpiler/src/main/java/org/jsweet/transpiler/JSweetTranspiler.java
@@ -1052,6 +1052,7 @@ public class JSweetTranspiler implements JSweetOptions {
 				logger.info("created " + outputFilePath);
 			} finally {
 				context.clearHeaders();
+				context.clearGlobalsMappings();
 				context.clearFooterStatements();
 			}
 			
diff --git a/transpiler/src/main/java/org/jsweet/transpiler/Java2TypeScriptTranslator.java b/transpiler/src/main/java/org/jsweet/transpiler/Java2TypeScriptTranslator.java
index f34201ad..e682070d 100644
--- a/transpiler/src/main/java/org/jsweet/transpiler/Java2TypeScriptTranslator.java
+++ b/transpiler/src/main/java/org/jsweet/transpiler/Java2TypeScriptTranslator.java
@@ -5783,7 +5783,7 @@ public class Java2TypeScriptTranslator extends AbstractTreePrinter {
 					print(exprStr, expr);
 					if (checkFirstArrayElement)
 						print("[0]");
-					print(").length == " + context.getFunctionalTypeParameterCount(type));
+					print(").length === " + context.getFunctionalTypeParameterCount(type));
 				}
 			} else {
 				print(exprStr, expr);