diff --git a/src/evmctl.c b/src/evmctl.c
index a30b7f3..b8ba339 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -2075,6 +2075,7 @@ static int read_tpm_banks(int num_banks, struct tpm_bank_info *bank)
 				log_debug("Failed to read %s PCRs: (%s)\n",
 					  bank[i].algo_name, errmsg);
 				free(errmsg);
+				errmsg = NULL;
 				bank[i].supported = 0;
 			}
 		}