diff --git a/cmd/ztest/ztest.c b/cmd/ztest/ztest.c
index 2a0c58e6c0..97211e01e7 100644
--- a/cmd/ztest/ztest.c
+++ b/cmd/ztest/ztest.c
@@ -1995,6 +1995,8 @@ ztest_io(ztest_ds_t *zd, uint64_t object, uint64_t offset)
 	case ZTEST_IO_SETATTR:
 		(void) ztest_setattr(zd, object);
 		break;
+	default:
+		break;
 	}
 
 	umem_free(data, blocksize);
diff --git a/module/zfs/dmu_send.c b/module/zfs/dmu_send.c
index 6b00b73b43..c817b8d9e5 100644
--- a/module/zfs/dmu_send.c
+++ b/module/zfs/dmu_send.c
@@ -996,6 +996,8 @@ backup_byteswap(dmu_replay_record_t *drr)
 		DO64(drr_end.drr_checksum.zc_word[3]);
 		DO64(drr_end.drr_toguid);
 		break;
+	default:
+		break;
 	}
 #undef DO64
 #undef DO32
diff --git a/module/zfs/dsl_prop.c b/module/zfs/dsl_prop.c
index d12d05a624..af99d74153 100644
--- a/module/zfs/dsl_prop.c
+++ b/module/zfs/dsl_prop.c
@@ -413,6 +413,8 @@ dsl_prop_check_prediction(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
 		case ZFS_PROP_QUOTA:
 		case ZFS_PROP_RESERVATION:
 			return;
+		default:
+			break;
 		}
 	}
 
diff --git a/module/zfs/sa.c b/module/zfs/sa.c
index e27dd62f4a..d238475da7 100644
--- a/module/zfs/sa.c
+++ b/module/zfs/sa.c
@@ -393,6 +393,8 @@ sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
 			if (error)
 				return (error);
 			break;
+		default:
+			break;
 		}
 	}
 	return (error);
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index fac53e3173..79e29b3021 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -3198,6 +3198,8 @@ zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
 				return (ENOTSUP);
 		}
 		break;
+	default:
+		break;
 	}
 
 	return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));