diff --git a/core/io/pck_packer.cpp b/core/io/pck_packer.cpp
index 9b49cc3d8c71..a7c715c31892 100644
--- a/core/io/pck_packer.cpp
+++ b/core/io/pck_packer.cpp
@@ -205,7 +205,7 @@ Error PCKPacker::flush(bool p_verbose) {
 
 	int header_padding = _get_pad(alignment, file->get_position());
 	for (int i = 0; i < header_padding; i++) {
-		file->store_8(Math::rand() % 256);
+		file->store_8(0);
 	}
 
 	int64_t file_base = file->get_position();
@@ -244,7 +244,7 @@ Error PCKPacker::flush(bool p_verbose) {
 
 		int pad = _get_pad(alignment, file->get_position());
 		for (int j = 0; j < pad; j++) {
-			file->store_8(Math::rand() % 256);
+			file->store_8(0);
 		}
 
 		count += 1;
diff --git a/editor/export/editor_export_platform.cpp b/editor/export/editor_export_platform.cpp
index 1ea5fbc7596d..208451acce33 100644
--- a/editor/export/editor_export_platform.cpp
+++ b/editor/export/editor_export_platform.cpp
@@ -236,7 +236,7 @@ Error EditorExportPlatform::_save_pack_file(void *p_userdata, const String &p_pa
 
 	int pad = _get_pad(PCK_PADDING, pd->f->get_position());
 	for (int i = 0; i < pad; i++) {
-		pd->f->store_8(Math::rand() % 256);
+		pd->f->store_8(0);
 	}
 
 	// Store MD5 of original file.
@@ -1659,7 +1659,7 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, b
 
 	int header_padding = _get_pad(PCK_PADDING, f->get_position());
 	for (int i = 0; i < header_padding; i++) {
-		f->store_8(Math::rand() % 256);
+		f->store_8(0);
 	}
 
 	uint64_t file_base = f->get_position();