diff --git a/files/internals/functions b/files/internals/functions
index 9b16c69..ccc3cd9 100644
--- a/files/internals/functions
+++ b/files/internals/functions
@@ -893,16 +893,20 @@ quar_hitlist() {
 }
 
 clamselector() {
-        scan_max_filesize=`cat $sig_md5_file | cut -d':' -f2 | sort -n | tail -n1`
-        if [ "$scan_max_filesize" -gt "1" 2> /dev/null ]; then
-                scan_max_filesize=$[scan_max_filesize+1]
-                clamscan_max_filesize="${scan_max_filesize}"
-                scan_max_filesize="${scan_max_filesize}c"
+        sig_max_filesize=`cat $sig_md5_file | cut -d':' -f2 | sort -n | tail -n1`
+        if [ "$sig_max_filesize" -gt "1" 2> /dev/null ]; then
+                if [ -z "$scan_max_filesize" ]; then
+                        scan_max_filesize="${scan_max_filesize}c"
+                fi
+                clamscan_max_filesize=$[sig_max_filesize+1]
         else
-                scan_max_filesize="2048k"
+                if [ -z "$scan_max_filesize" ]; then
+                        scan_max_filesize="2048k"
+                fi
                 clamscan_max_filesize="2592000"
         fi
 
+
         if [ "$scan_clamscan" == "1" ]; then
                 trim_log $clamscan_log 10000 1
                 for dpath in $clamav_paths; do