diff --git a/install.cpp b/install.cpp
index d30890a..05209cd 100644
--- a/install.cpp
+++ b/install.cpp
@@ -481,7 +481,7 @@
     }
 
     // Try to open the package.
-    ZipArchive zip;
+    ZipArchive zip = {};
     int err = mzOpenZipArchive(map.addr, map.length, &zip);
     if (err != 0) {
         LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");