diff --git a/squashfs-tools/unsquash-4.c b/squashfs-tools/unsquash-4.c

index ecdaac796f09..2c0cf63daf67 100644

--- a/squashfs-tools/unsquash-4.c

+++ b/squashfs-tools/unsquash-4.c

@@ -31,9 +31,9 @@ static unsigned int *id_table;

 int read_fragment_table_4(long long *directory_table_end)

 {

 	int res, i;

-	int bytes = SQUASHFS_FRAGMENT_BYTES(sBlk.s.fragments);

-	int  indexes = SQUASHFS_FRAGMENT_INDEXES(sBlk.s.fragments);

-	long long fragment_table_index[indexes];

+	size_t bytes = SQUASHFS_FRAGMENT_BYTES(sBlk.s.fragments);

+	size_t indexes = SQUASHFS_FRAGMENT_INDEXES(sBlk.s.fragments);

+	long long *fragment_table_index;

 	TRACE("read_fragment_table: %d fragments, reading %d fragment indexes "

 		"from 0x%llx\n", sBlk.s.fragments, indexes,

@@ -44,6 +44,11 @@ int read_fragment_table_4(long long *directory_table_end)

 		return TRUE;

 	}

+	fragment_table_index = malloc(indexes*sizeof(long long));

+	if(fragment_table_index == NULL)

+		EXIT_UNSQUASH("read_fragment_table: failed to allocate "

+			"fragment table index\n");

+

 	fragment_table = malloc(bytes);

 	if(fragment_table == NULL)

 		EXIT_UNSQUASH("read_fragment_table: failed to allocate "