Index: uspace/srv/fs/exfat/exfat_fat.c
===================================================================
--- uspace/srv/fs/exfat/exfat_fat.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/srv/fs/exfat/exfat_fat.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -193,5 +193,5 @@
 	uint32_t clusters;
 	uint32_t max_clusters;
-	exfat_cluster_t c;
+	exfat_cluster_t c = EXFAT_CLST_FIRST;
 	int rc;
 
Index: uspace/srv/fs/fat/fat_fat.c
===================================================================
--- uspace/srv/fs/fat/fat_fat.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/srv/fs/fat/fat_fat.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -748,5 +748,6 @@
 {
 	unsigned fatno;
-	fat_cluster_t nextc, clst_bad = FAT_CLST_BAD(bs);
+	fat_cluster_t nextc = 0;
+	fat_cluster_t clst_bad = FAT_CLST_BAD(bs);
 	int rc;