diff --git a/ndb/postgres.nim b/ndb/postgres.nim
index 2a3b1b3..40ae43f 100644
--- a/ndb/postgres.nim
+++ b/ndb/postgres.nim
@@ -221,7 +221,7 @@ proc dbError*(db: DbConn) {.noreturn.} =
 
 proc tryWithStmt(db: DbConn, query: SqlQuery, args: seq[DbValue],
                  expectedStatusType: ExecStatusType,
-                 body: proc(res: PPGresult): bool {.raises: [], tags: [].}): bool =
+                 body: proc(res: PPGresult): bool {.raises: [], tags: [], gcsafe.}): bool =
   ## A common template dealing with statement initialization and finalization:
   ##
   ## 1. Initialize a statement.
diff --git a/ndb/sqlite.nim b/ndb/sqlite.nim
index 9507fcf..04acbe2 100644
--- a/ndb/sqlite.nim
+++ b/ndb/sqlite.nim
@@ -239,7 +239,7 @@ proc bindArgs(db: DbConn, stmt: var sqlite3.Pstmt, query: SqlQuery,
   return true
 
 proc tryWithStmt(db: DbConn, query: SqlQuery, args: seq[DbValue],
-                 body: proc(stmt: Pstmt): bool {.raises: [], tags: [].}): bool =
+                 body: proc(stmt: Pstmt): bool {.raises: [], tags: [], gcsafe.}): bool =
   ## A common template dealing with statement initialization and finalization:
   ##
   ## 1. Initialize a statement.