diff --git libcgroup-0.42.2/src/api.c libcgroup-0.42.2/src/api.c
index 1557393..318a438 100644
--- libcgroup-0.42.2/src/api.c
+++ libcgroup-0.42.2/src/api.c
@@ -3457,10 +3457,10 @@ int cgroup_change_cgroup_flags(uid_t uid, gid_t gid,
 						available, "%d", pid);
 					break;
 				case 'p':
-					if(procname) {
+					if(procname && strlen(basename(procname))) {
 						written = snprintf(newdest + j,
 							available, "%s",
-							procname);
+							basename(procname));
 					} else {
 						written = snprintf(newdest + j,
 							available, "%d", pid);