diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp
index fe61a5d2aa..663c66fe9f 100644
--- a/platform/android/export/export.cpp
+++ b/platform/android/export/export.cpp
@@ -602,7 +602,7 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 		zipfi.tmz_date.tm_hour = time.hour;
 		zipfi.tmz_date.tm_mday = date.day;
 		zipfi.tmz_date.tm_min = time.min;
-		zipfi.tmz_date.tm_mon = date.month;
+		zipfi.tmz_date.tm_mon = date.month - 1; // tm_mon is zero indexed
 		zipfi.tmz_date.tm_sec = time.sec;
 		zipfi.tmz_date.tm_year = date.year;
 		zipfi.dosDate = 0;