diff --git a/java/ql/src/Likely Bugs/Nullness/NullMaybe.ql b/java/ql/src/Likely Bugs/Nullness/NullMaybe.ql
index d29ebd7fb898..13a800ae5391 100644
--- a/java/ql/src/Likely Bugs/Nullness/NullMaybe.ql	
+++ b/java/ql/src/Likely Bugs/Nullness/NullMaybe.ql	
@@ -21,6 +21,8 @@ from VarAccess access, SsaSourceVariable var, string msg, Expr reason
 where
   nullDeref(var, access, msg, reason) and
   // Exclude definite nulls here, as these are covered by `NullAlways.ql`.
-  not alwaysNullDeref(var, access)
+  not alwaysNullDeref(var, access) and
+  // Kotlin enforces this already:
+  not access.getLocation().getFile().isKotlinSourceFile()
 select access, "Variable $@ may be null here " + msg + ".", var.getVariable(),
   var.getVariable().getName(), reason, "this"
diff --git a/java/ql/test/kotlin/query-tests/NullMaybe/NullMaybe.expected b/java/ql/test/kotlin/query-tests/NullMaybe/NullMaybe.expected
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/java/ql/test/kotlin/query-tests/NullMaybe/NullMaybe.qlref b/java/ql/test/kotlin/query-tests/NullMaybe/NullMaybe.qlref
new file mode 100644
index 000000000000..ab01473d8e53
--- /dev/null
+++ b/java/ql/test/kotlin/query-tests/NullMaybe/NullMaybe.qlref
@@ -0,0 +1 @@
+Likely Bugs/Nullness/NullMaybe.ql
diff --git a/java/ql/test/kotlin/query-tests/NullMaybe/Test.kt b/java/ql/test/kotlin/query-tests/NullMaybe/Test.kt
new file mode 100644
index 000000000000..dc86a0eb34c0
--- /dev/null
+++ b/java/ql/test/kotlin/query-tests/NullMaybe/Test.kt
@@ -0,0 +1,7 @@
+fun fn(b: Boolean) {
+    var d: Double? = null
+    if (b) {
+        d = 1.0
+    }
+    println(d!!)
+}