diff --git a/sdk/tools/spec2def/spec2def.c b/sdk/tools/spec2def/spec2def.c
index e30e5a0cad4..2ab25d9f96d 100644
--- a/sdk/tools/spec2def/spec2def.c
+++ b/sdk/tools/spec2def/spec2def.c
@@ -1467,6 +1467,7 @@ ApplyOrdinals(EXPORT* pexports, unsigned cExports)
             if (used[pexports[i].nOrdinal] != 0)
             {
                 fprintf(stderr, "Found duplicate ordinal: %u\n", pexports[i].nOrdinal);
+                free(used);
                 return -1;
             }
             used[pexports[i].nOrdinal] = 1;