diff --git a/cmd/btoa/btoa.c b/cmd/btoa/btoa.c
index aeff0671f3..f82341325b 100644
--- a/cmd/btoa/btoa.c
+++ b/cmd/btoa/btoa.c
@@ -211,5 +211,8 @@ main(int argc, char **argv)
     if (outFile && closeOut) {
         fclose(outFile);
     }
+    if (suffix) {
+        PORT_Free(suffix);
+    }
     return exitCode;
 }