diff --git a/src/interfaces/libpq/fe-secure.c b/src/interfaces/libpq/fe-secure.c
index 5c59c0688ef..9e7ae472ed7 100644
--- a/src/interfaces/libpq/fe-secure.c
+++ b/src/interfaces/libpq/fe-secure.c
@@ -1120,6 +1120,7 @@ initialize_SSL(PGconn *conn)
 #endif
 			}
 			/* if not found, silently ignore;  we do not require CRL */
+			ERR_clear_error();
 		}
 		have_rootcert = true;
 	}