diff --git a/ntfsprogs/ntfsclone.c b/ntfsprogs/ntfsclone.c
index bbf6d1f0..00876313 100644
--- a/ntfsprogs/ntfsclone.c
+++ b/ntfsprogs/ntfsclone.c
@@ -465,6 +465,7 @@ static void parse_options(int argc, char **argv)
 			break;
 		case 'O':
 			opt.overwrite++;
+			/* FALLTHRU */
 		case 'o':
 			if (opt.output)
 				usage(1);
diff --git a/ntfsprogs/ntfsdecrypt.c b/ntfsprogs/ntfsdecrypt.c
index dbffc946..3fc34312 100644
--- a/ntfsprogs/ntfsdecrypt.c
+++ b/ntfsprogs/ntfsdecrypt.c
@@ -557,6 +557,7 @@ check_again:
 		switch (err) {
 		case GNUTLS_BAG_PKCS8_KEY:
 			flags = GNUTLS_PKCS_PLAIN;
+			/* FALLTHRU */
 		case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
 			err = gnutls_pkcs12_bag_get_data(bag, 0, &dkey);
 			if (err < 0) {
@@ -1481,12 +1482,15 @@ static int ntfs_feed_encrypt(ntfs_inode *inode, ntfs_fek *fek)
 						default :
 							*b++ = val;
 							val >>= 8;
+							/* FALLTHRU */
 						case 3 :
 							*b++ = val;
 							val >>= 8;
+							/* FALLTHRU */
 						case 2 :
 							*b++ = val;
 							val >>= 8;
+							/* FALLTHRU */
 						case 1 :
 							*b++ = val;
 							val >>= 8;
diff --git a/ntfsprogs/ntfsfallocate.c b/ntfsprogs/ntfsfallocate.c
index b0a7c4ec..7a2df7d1 100644
--- a/ntfsprogs/ntfsfallocate.c
+++ b/ntfsprogs/ntfsfallocate.c
@@ -214,10 +214,15 @@ static s64 option_value(const char *arg)
 		count = 0;
 		switch (*s++) {
 		case 'E' : count++;
+			/* FALLTHRU */
 		case 'P' : count++;
+			/* FALLTHRU */
 		case 'T' : count++;
+			/* FALLTHRU */
 		case 'G' : count++;
+			/* FALLTHRU */
 		case 'M' : count++;
+			/* FALLTHRU */
 		case 'K' : count++;
 			switch (*s++) {
 			case 'i' :
diff --git a/ntfsprogs/ntfsresize.c b/ntfsprogs/ntfsresize.c
index a912f9df..48bb76ee 100644
--- a/ntfsprogs/ntfsresize.c
+++ b/ntfsprogs/ntfsresize.c
@@ -453,8 +453,10 @@ static s64 get_new_volume_size(char *s)
 	switch (*suffix) {
 	case 'G':
 		size *= prefix_kind;
+		/* FALLTHRU */
 	case 'M':
 		size *= prefix_kind;
+		/* FALLTHRU */
 	case 'k':
 		size *= prefix_kind;
 		break;
diff --git a/ntfsprogs/ntfsundelete.c b/ntfsprogs/ntfsundelete.c
index 746eac7b..caa1a128 100644
--- a/ntfsprogs/ntfsundelete.c
+++ b/ntfsprogs/ntfsundelete.c
@@ -567,10 +567,15 @@ static int parse_time(const char *value, time_t *since)
 
 	switch (suffix[0]) {
 		case 'y': case 'Y': result *=   12;
+			/* FALLTHRU */
 		case 'm': case 'M': result *=    4;
+			/* FALLTHRU */
 		case 'w': case 'W': result *=    7;
+			/* FALLTHRU */
 		case 'd': case 'D': result *=   24;
+			/* FALLTHRU */
 		case 'h': case 'H': result *= 3600;
+			/* FALLTHRU */
 		case 0:
 		    break;
 
diff --git a/ntfsprogs/ntfswipe.c b/ntfsprogs/ntfswipe.c
index b41f6168..ef67101e 100644
--- a/ntfsprogs/ntfswipe.c
+++ b/ntfsprogs/ntfswipe.c
@@ -314,6 +314,7 @@ static int parse_options(int argc, char *argv[])
 
 		case 'i':
 			opts.info++;		/* and fall through */
+			/* FALLTHRU */
 		case 'a':
 			opts.directory++;
 			opts.logfile++;
diff --git a/ntfsprogs/utils.c b/ntfsprogs/utils.c
index 45a03a4f..393c34a4 100644
--- a/ntfsprogs/utils.c
+++ b/ntfsprogs/utils.c
@@ -364,9 +364,13 @@ int utils_parse_size(const char *value, s64 *size, BOOL scale)
 	if (scale) {
 		switch (suffix[0]) {
 			case 't': case 'T': result *= 1000;
+				/* FALLTHRU */
 			case 'g': case 'G': result *= 1000;
+				/* FALLTHRU */
 			case 'm': case 'M': result *= 1000;
+				/* FALLTHRU */
 			case 'k': case 'K': result *= 1000;
+				/* FALLTHRU */
 			case '-': case 0:
 				break;
 			default: