Index: crypto/heimdal/lib/krb5/rd_cred.c
===================================================================
--- crypto/heimdal/lib/krb5/rd_cred.c
+++ crypto/heimdal/lib/krb5/rd_cred.c
@@ -222,7 +222,7 @@
 
 	if (enc_krb_cred_part.timestamp == NULL ||
 	    enc_krb_cred_part.usec      == NULL ||
-	    abs(*enc_krb_cred_part.timestamp - sec)
+	    labs(*enc_krb_cred_part.timestamp - sec)
 	    > context->max_skew) {
 	    krb5_clear_error_message (context);
 	    ret = KRB5KRB_AP_ERR_SKEW;
Index: crypto/heimdal/lib/krb5/rd_priv.c
===================================================================
--- crypto/heimdal/lib/krb5/rd_priv.c
+++ crypto/heimdal/lib/krb5/rd_priv.c
@@ -136,7 +136,7 @@
 	krb5_timeofday (context, &sec);
 	if (part.timestamp == NULL ||
 	    part.usec      == NULL ||
-	    abs(*part.timestamp - sec) > context->max_skew) {
+	    labs(*part.timestamp - sec) > context->max_skew) {
 	    krb5_clear_error_message (context);
 	    ret = KRB5KRB_AP_ERR_SKEW;
 	    goto failure_part;
Index: crypto/heimdal/lib/krb5/rd_req.c
===================================================================
--- crypto/heimdal/lib/krb5/rd_req.c
+++ crypto/heimdal/lib/krb5/rd_req.c
@@ -441,7 +441,7 @@
 
 	krb5_timeofday (context, &now);
 
-	if (abs(ac->authenticator->ctime - now) > context->max_skew) {
+	if (labs(ac->authenticator->ctime - now) > context->max_skew) {
 	    ret = KRB5KRB_AP_ERR_SKEW;
 	    krb5_clear_error_message (context);
 	    goto out;
Index: crypto/heimdal/lib/krb5/rd_safe.c
===================================================================
--- crypto/heimdal/lib/krb5/rd_safe.c
+++ crypto/heimdal/lib/krb5/rd_safe.c
@@ -159,7 +159,7 @@
 
 	if (safe.safe_body.timestamp == NULL ||
 	    safe.safe_body.usec      == NULL ||
-	    abs(*safe.safe_body.timestamp - sec) > context->max_skew) {
+	    labs(*safe.safe_body.timestamp - sec) > context->max_skew) {
 	    ret = KRB5KRB_AP_ERR_SKEW;
 	    krb5_clear_error_message (context);
 	    goto failure;
Index: crypto/heimdal/lib/krb5/ticket.c
===================================================================
--- crypto/heimdal/lib/krb5/ticket.c
+++ crypto/heimdal/lib/krb5/ticket.c
@@ -776,11 +776,11 @@
 	tmp_time = rep->enc_part.authtime;
 
     if (creds->times.starttime == 0
-	&& abs(tmp_time - sec_now) > context->max_skew) {
+	&& labs(tmp_time - sec_now) > context->max_skew) {
 	ret = KRB5KRB_AP_ERR_SKEW;
 	krb5_set_error_message (context, ret,
 				N_("time skew (%d) larger than max (%d)", ""),
-			       abs(tmp_time - sec_now),
+			       labs(tmp_time - sec_now),
 			       (int)context->max_skew);
 	goto out;
     }