diff --git a/glean/db/Glean/Database/Storage/RocksDB.hs b/glean/db/Glean/Database/Storage/RocksDB.hs
index a71befae9..736c67328 100644
--- a/glean/db/Glean/Database/Storage/RocksDB.hs
+++ b/glean/db/Glean/Database/Storage/RocksDB.hs
@@ -403,7 +403,7 @@ foreign import ccall unsafe glean_rocksdb_get_ownership
   -> Ptr (Ptr Ownership)
   -> IO CString
 
-foreign import ccall unsafe glean_rocksdb_add_define_ownership
+foreign import ccall safe glean_rocksdb_add_define_ownership
   :: Ptr (Database RocksDB)
   -> Ptr DefineOwnership
   -> IO CString
diff --git a/glean/hs/Glean/RTS/Foreign/Ownership.hsc b/glean/hs/Glean/RTS/Foreign/Ownership.hsc
index 6c0fa4490..ecafa7e01 100644
--- a/glean/hs/Glean/RTS/Foreign/Ownership.hsc
+++ b/glean/hs/Glean/RTS/Foreign/Ownership.hsc
@@ -316,18 +316,18 @@ foreign import ccall unsafe glean_new_define_ownership
 foreign import ccall unsafe "&glean_define_ownership_free"
   glean_define_ownership_free :: FunPtr (Ptr DefineOwnership -> IO ())
 
-foreign import ccall unsafe glean_define_ownership_subst
+foreign import ccall safe glean_define_ownership_subst
   :: Ptr DefineOwnership
   -> Ptr Subst
   -> IO CString
 
-foreign import ccall unsafe glean_define_ownership_sort_by_owner
+foreign import ccall safe glean_define_ownership_sort_by_owner
   :: Ptr DefineOwnership
   -> Word64
   -> Ptr (HsArray Int64)
   -> IO CString
 
-foreign import ccall unsafe glean_define_ownership_add_derived
+foreign import ccall safe glean_define_ownership_add_derived
   :: Ptr Lookup
   -> Ptr DefineOwnership
   -> Word64