diff --git a/hfs/rawfile.c b/hfs/rawfile.c
index 9023acf..573f611 100644
--- a/hfs/rawfile.c
+++ b/hfs/rawfile.c
@@ -374,6 +374,7 @@ int writeExtents(RawFile* rawFile) {
 	if(extent != NULL) {
 		extentKey.keyLength = sizeof(HFSPlusExtentKey) - sizeof(extentKey.keyLength);
 		extentKey.forkType = 0;
+		extentKey.pad = 0;
 		extentKey.fileID = rawFile->id;
 
 		currentExtent = 0;