diff --git a/OtherLanguages/js/src/Lerc.ts b/OtherLanguages/js/src/Lerc.ts
index c64c20a..31fb318 100755
--- a/OtherLanguages/js/src/Lerc.ts
+++ b/OtherLanguages/js/src/Lerc.ts
@@ -263,6 +263,7 @@ function initLercLib(lercFactory: LercFactory): void {
       bandCountWithNoData
     };
     if (bandCountWithNoData) {
+      _free(ptr);
       return headerInfo;
     }
     if (depthCount === 1 && bandCount === 1) {