--- flow-tools-0.68.5/lib/fterr.c~	2008-01-27 21:48:49.000000000 +0100
+++ flow-tools-0.68.5/lib/fterr.c	2018-03-18 23:16:48.649159418 +0100
@@ -112,7 +112,7 @@
     fprintf(((fterr_file) ? fterr_file : stderr), "%s\n", buf2);
 
   if (fterr_flags & FTERR_SYSLOG)
-    syslog(LOG_INFO, buf);
+    syslog(LOG_INFO, "%s" ,buf);
 
 } /* fterr_info */
 
@@ -134,7 +134,7 @@
 
   if (fterr_flags & FTERR_SYSLOG) {
     snprintf(buf2, 1024, "%s: %s", buf, strerror(errno));
-    syslog(LOG_INFO, buf2);
+    syslog(LOG_INFO, "%s", buf2);
   }
 
   if (fterr_exit)
@@ -159,7 +159,7 @@
   }
 
   if (fterr_flags & FTERR_SYSLOG)
-    syslog(LOG_INFO, buf);
+    syslog(LOG_INFO, "%s", buf);
 
   if (fterr_exit)
     fterr_exit(code);
@@ -183,7 +183,7 @@
   }
 
   if (fterr_flags & FTERR_SYSLOG)
-    syslog(LOG_INFO, buf);
+    syslog(LOG_INFO, "%s", buf);
 
 } /* fterr_warnx */
 
@@ -205,7 +205,7 @@
 
   if (fterr_flags & FTERR_SYSLOG) {
     snprintf(buf2, 1024, "%s: %s", buf, strerror(errno));
-    syslog(LOG_INFO, buf2);
+    syslog(LOG_INFO, "%s", buf2);
   }
 
 } /* fterr_warn */