diff --git a/lib/config/config.c b/lib/config/config.c
index 2c77f3076..d1cf590ff 100644
--- a/lib/config/config.c
+++ b/lib/config/config.c
@@ -577,7 +577,11 @@ int config_def_check(struct cmd_context *cmd, int force, int skip, int suppress_
 				cmd->cft_def_hash = NULL;
 				r = 0; goto out;
 			}
-			dm_hash_insert(cmd->cft_def_hash, vp, def);
+			if (!dm_hash_insert(cmd->cft_def_hash, vp, def)) {
+				log_error("Failed to insert configuration to hash.");
+				r = 0;
+				goto out;
+			}
 		}
 	}