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-rw-r--r--src/db/lib.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/db/lib.rs b/src/db/lib.rs
index 5304c195..d96586be 100644
--- a/src/db/lib.rs
+++ b/src/db/lib.rs
@@ -2,6 +2,9 @@
#[cfg(feature = "sqlite")]
extern crate tracing;
+#[cfg(not(any(feature = "lmdb", feature = "sled", feature = "sqlite")))]
+compile_error!("Must activate the Cargo feature for at least one DB engine: lmdb, sled or sqlite.");
+
#[cfg(feature = "lmdb")]
pub mod lmdb_adapter;
#[cfg(feature = "sled")]