diff --git a/cmdline/murmur3.c b/cmdline/murmur3.c
index 2731cd92..71b61da8 100644
--- a/cmdline/murmur3.c
+++ b/cmdline/murmur3.c
@@ -136,25 +136,29 @@ void MurmurHash3_x86_128(const void* data, size_t size, const uint8_t* seed, voi
 		uint32_t k4 = 0;
 
 		switch (size_remainder) {
-		case 15 : k4 ^= (uint32_t)tail[14] << 16;
-		case 14 : k4 ^= (uint32_t)tail[13] << 8;
-		case 13 : k4 ^= (uint32_t)tail[12] << 0;
+		case 15 : k4 ^= (uint32_t)tail[14] << 16; /* fallthrough */
+		case 14 : k4 ^= (uint32_t)tail[13] << 8; /* fallthrough */
+		case 13 : k4 ^= (uint32_t)tail[12] << 0; /* fallthrough */
 			k4 *= c4; k4 = util_rotl32(k4, 18); k4 *= c1; h4 ^= k4;
-		case 12 : k3 ^= (uint32_t)tail[11] << 24;
-		case 11 : k3 ^= (uint32_t)tail[10] << 16;
-		case 10 : k3 ^= (uint32_t)tail[ 9] << 8;
-		case 9 : k3 ^= (uint32_t)tail[ 8] << 0;
+			/* fallthrough */
+		case 12 : k3 ^= (uint32_t)tail[11] << 24; /* fallthrough */
+		case 11 : k3 ^= (uint32_t)tail[10] << 16; /* fallthrough */
+		case 10 : k3 ^= (uint32_t)tail[ 9] << 8; /* fallthrough */
+		case 9 : k3 ^= (uint32_t)tail[ 8] << 0; /* fallthrough */
 			k3 *= c3; k3 = util_rotl32(k3, 17); k3 *= c4; h3 ^= k3;
-		case 8 : k2 ^= (uint32_t)tail[ 7] << 24;
-		case 7 : k2 ^= (uint32_t)tail[ 6] << 16;
-		case 6 : k2 ^= (uint32_t)tail[ 5] << 8;
-		case 5 : k2 ^= (uint32_t)tail[ 4] << 0;
+			/* fallthrough */
+		case 8 : k2 ^= (uint32_t)tail[ 7] << 24; /* fallthrough */
+		case 7 : k2 ^= (uint32_t)tail[ 6] << 16; /* fallthrough */
+		case 6 : k2 ^= (uint32_t)tail[ 5] << 8; /* fallthrough */
+		case 5 : k2 ^= (uint32_t)tail[ 4] << 0; /* fallthrough */
 			k2 *= c2; k2 = util_rotl32(k2, 16); k2 *= c3; h2 ^= k2;
-		case 4 : k1 ^= (uint32_t)tail[ 3] << 24;
-		case 3 : k1 ^= (uint32_t)tail[ 2] << 16;
-		case 2 : k1 ^= (uint32_t)tail[ 1] << 8;
-		case 1 : k1 ^= (uint32_t)tail[ 0] << 0;
+			/* fallthrough */
+		case 4 : k1 ^= (uint32_t)tail[ 3] << 24; /* fallthrough */
+		case 3 : k1 ^= (uint32_t)tail[ 2] << 16; /* fallthrough */
+		case 2 : k1 ^= (uint32_t)tail[ 1] << 8; /* fallthrough */
+		case 1 : k1 ^= (uint32_t)tail[ 0] << 0; /* fallthrough */
 			k1 *= c1; k1 = util_rotl32(k1, 15); k1 *= c2; h1 ^= k1;
+			/* fallthrough */
 		}
 	}
 
diff --git a/cmdline/snapraid.c b/cmdline/snapraid.c
index 12218726..ac40f0b0 100644
--- a/cmdline/snapraid.c
+++ b/cmdline/snapraid.c
@@ -1091,7 +1091,7 @@ int main(int argc, char* argv[])
 			exit(EXIT_FAILURE);
 			/* LCOV_EXCL_STOP */
 		}
-		/* follow */
+		/* fallthrough */
 	case OPERATION_SPINUP :
 	case OPERATION_SPINDOWN :
 		if (!tommy_list_empty(&filterlist_file)) {
diff --git a/tommyds/tommyhash.c b/tommyds/tommyhash.c
index 05d78d25..cc7495da 100644
--- a/tommyds/tommyhash.c
+++ b/tommyds/tommyhash.c
@@ -92,22 +92,22 @@ tommy_uint32_t tommy_hash_u32(tommy_uint32_t init_val, const void* void_key, tom
 		b += tommy_le_uint32_read(key + 4);
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 11 : c += ((tommy_uint32_t)key[10]) << 16;
-	case 10 : c += ((tommy_uint32_t)key[9]) << 8;
-	case 9 : c += key[8];
+	case 11 : c += ((tommy_uint32_t)key[10]) << 16; /* fallthrough */
+	case 10 : c += ((tommy_uint32_t)key[9]) << 8; /* fallthrough */
+	case 9 : c += key[8]; /* fallthrough */
 	case 8 :
 		b += tommy_le_uint32_read(key + 4);
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 7 : b += ((tommy_uint32_t)key[6]) << 16;
-	case 6 : b += ((tommy_uint32_t)key[5]) << 8;
-	case 5 : b += key[4];
+	case 7 : b += ((tommy_uint32_t)key[6]) << 16; /* fallthrough */
+	case 6 : b += ((tommy_uint32_t)key[5]) << 8; /* fallthrough */
+	case 5 : b += key[4]; /* fallthrough */
 	case 4 :
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 3 : a += ((tommy_uint32_t)key[2]) << 16;
-	case 2 : a += ((tommy_uint32_t)key[1]) << 8;
-	case 1 : a += key[0];
+	case 3 : a += ((tommy_uint32_t)key[2]) << 16; /* fallthrough */
+	case 2 : a += ((tommy_uint32_t)key[1]) << 8; /* fallthrough */
+	case 1 : a += key[0]; /* fallthrough */
 	}
 
 	tommy_final(a, b, c);
@@ -142,22 +142,22 @@ tommy_uint64_t tommy_hash_u64(tommy_uint64_t init_val, const void* void_key, tom
 		b += tommy_le_uint32_read(key + 4);
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 11 : c += ((tommy_uint32_t)key[10]) << 16;
-	case 10 : c += ((tommy_uint32_t)key[9]) << 8;
-	case 9 : c += key[8];
+	case 11 : c += ((tommy_uint32_t)key[10]) << 16; /* fallthrough */
+	case 10 : c += ((tommy_uint32_t)key[9]) << 8; /* fallthrough */
+	case 9 : c += key[8]; /* fallthrough */
 	case 8 :
 		b += tommy_le_uint32_read(key + 4);
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 7 : b += ((tommy_uint32_t)key[6]) << 16;
-	case 6 : b += ((tommy_uint32_t)key[5]) << 8;
-	case 5 : b += key[4];
+	case 7 : b += ((tommy_uint32_t)key[6]) << 16; /* fallthrough */
+	case 6 : b += ((tommy_uint32_t)key[5]) << 8; /* fallthrough */
+	case 5 : b += key[4]; /* fallthrough */
 	case 4 :
 		a += tommy_le_uint32_read(key + 0);
 		break;
-	case 3 : a += ((tommy_uint32_t)key[2]) << 16;
-	case 2 : a += ((tommy_uint32_t)key[1]) << 8;
-	case 1 : a += key[0];
+	case 3 : a += ((tommy_uint32_t)key[2]) << 16; /* fallthrough */
+	case 2 : a += ((tommy_uint32_t)key[1]) << 8; /* fallthrough */
+	case 1 : a += key[0]; /* fallthrough */
 	}
 
 	tommy_final(a, b, c);