diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index 66e3b45f30..1ee568b3b6 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -17,7 +17,7 @@
 
 #ifdef CONFIG_TPM
 
-int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
+int tpm_config_parse(QemuOptsList *opts_list, const char *optstr);
 int tpm_init(void);
 void tpm_cleanup(void);
 
diff --git a/softmmu/tpm.c b/softmmu/tpm.c
index 578563f05a..7164ea7ff1 100644
--- a/softmmu/tpm.c
+++ b/softmmu/tpm.c
@@ -175,15 +175,15 @@ int tpm_init(void)
  * Parse the TPM configuration options.
  * To display all available TPM backends the user may use '-tpmdev help'
  */
-int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
+int tpm_config_parse(QemuOptsList *opts_list, const char *optstr)
 {
     QemuOpts *opts;
 
-    if (!strcmp(optarg, "help")) {
+    if (!strcmp(optstr, "help")) {
         tpm_display_backend_drivers();
         return -1;
     }
-    opts = qemu_opts_parse_noisily(opts_list, optarg, true);
+    opts = qemu_opts_parse_noisily(opts_list, optstr, true);
     if (!opts) {
         return -1;
     }