diff --git a/tools/aapt/Package.cpp b/tools/aapt/Package.cpp
index 5e0f87f..60c4bf5 100644
--- a/tools/aapt/Package.cpp
+++ b/tools/aapt/Package.cpp
@@ -292,13 +292,12 @@
             }
             if (!hasData) {
                 const String8& srcName = file->getSourceFile();
-                time_t fileModWhen;
-                fileModWhen = getFileModDate(srcName.c_str());
-                if (fileModWhen == (time_t) -1) { // file existence tested earlier,
-                    return false;                 //  not expecting an error here
+                auto fileModWhen = getFileModDate(srcName.c_str());
+                if (fileModWhen == kInvalidModDate) { // file existence tested earlier,
+                    return false;                     //  not expecting an error here
                 }
-    
-                if (fileModWhen > entry->getModWhen()) {
+
+                if (toTimeT(fileModWhen) > entry->getModWhen()) {
                     // mark as deleted so add() will succeed
                     if (bundle->getVerbose()) {
                         printf("      (removing old '%s')\n", storageName.c_str());