diff --git a/src/eval.c b/src/eval.c
index 954cfe9..ac49051 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -146,6 +146,10 @@ apfl_ctx_new(void)
 void
 apfl_ctx_destroy(apfl_ctx ctx)
 {
+    if (ctx == NULL) {
+        return;
+    }
+
     apfl_hashmap_destroy(ctx->scope);
     free(ctx);
 }