diff --git a/src/cfgparse.c b/src/cfgparse.c
index 4263f9432..4036e29b5 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -2647,6 +2647,7 @@ stats_error_parsing:
 
 			/* use HTTP request to check servers' health */
 			free(curproxy->check_req);
+			curproxy->check_req = NULL;
 			curproxy->options &= ~PR_O_SSL3_CHK;
 			curproxy->options &= ~PR_O_SMTP_CHK;
 			curproxy->options2 &= ~PR_O2_MYSQL_CHK;
@@ -2677,6 +2678,7 @@ stats_error_parsing:
 				err_code |= ERR_WARN;
 
 			free(curproxy->check_req);
+			curproxy->check_req = NULL;
 			curproxy->options &= ~PR_O_HTTP_CHK;
 			curproxy->options &= ~PR_O_SMTP_CHK;
 			curproxy->options2 &= ~PR_O2_MYSQL_CHK;
@@ -2685,6 +2687,7 @@ stats_error_parsing:
 		else if (!strcmp(args[1], "smtpchk")) {
 			/* use SMTP request to check servers' health */
 			free(curproxy->check_req);
+			curproxy->check_req = NULL;
 			curproxy->options &= ~PR_O_HTTP_CHK;
 			curproxy->options &= ~PR_O_SSL3_CHK;
 			curproxy->options2 &= ~PR_O2_MYSQL_CHK;
@@ -2710,6 +2713,7 @@ stats_error_parsing:
 		else if (!strcmp(args[1], "mysql-check")) {
 			/* use MYSQL request to check servers' health */
 			free(curproxy->check_req);
+			curproxy->check_req = NULL;
 			curproxy->options &= ~PR_O_HTTP_CHK;
 			curproxy->options &= ~PR_O_SSL3_CHK;
 			curproxy->options &= ~PR_O_SMTP_CHK;