diff --git a/transpiler/src/main/java/org/jsweet/JSweetConfig.java b/transpiler/src/main/java/org/jsweet/JSweetConfig.java
index 80fcccb2..fa3e073e 100644
--- a/transpiler/src/main/java/org/jsweet/JSweetConfig.java
+++ b/transpiler/src/main/java/org/jsweet/JSweetConfig.java
@@ -396,6 +396,7 @@ public abstract class JSweetConfig {
 		{
 			add("function");
 			add("var");
+			add("let");
 			add("delete");
 			add("typeof");
 			add("in");
diff --git a/transpiler/src/test/java/org/jsweet/test/transpiler/SyntaxTests.java b/transpiler/src/test/java/org/jsweet/test/transpiler/SyntaxTests.java
index 05b86f0f..30966eb8 100644
--- a/transpiler/src/test/java/org/jsweet/test/transpiler/SyntaxTests.java
+++ b/transpiler/src/test/java/org/jsweet/test/transpiler/SyntaxTests.java
@@ -68,7 +68,7 @@ public class SyntaxTests extends AbstractTest {
 	@Test
 	public void testKeywords() {
 		eval((logHandler, r) -> {
-			Assert.assertEquals(14, logHandler.reportedProblems.size());
+			Assert.assertEquals(15, logHandler.reportedProblems.size());
 			for (JSweetProblem problem : logHandler.reportedProblems) {
 				Assert.assertEquals(JSweetProblem.JS_KEYWORD_CONFLICT, problem);
 			}
diff --git a/transpiler/src/test/java/source/syntax/Keywords.java b/transpiler/src/test/java/source/syntax/Keywords.java
index fd7f351c..82b7adb9 100644
--- a/transpiler/src/test/java/source/syntax/Keywords.java
+++ b/transpiler/src/test/java/source/syntax/Keywords.java
@@ -31,6 +31,7 @@ public class Keywords {
 		k.m2(1, 2);
 		$export("trace", trace.join(","));
 		assert 2 == new Other1().export();
+		assert 2 == new Other1().let();
 	}
 
 	String in;
@@ -95,6 +96,11 @@ class Other1 {
 		return export;
 	}
 
+	public int let() {
+		int let = 2;
+		return let;
+	}
+
 }
 
 class Other2 {