diff --git a/lib/squid.pm b/lib/squid.pm
index 7ccbcd8..9f27679 100644
--- a/lib/squid.pm
+++ b/lib/squid.pm
@@ -1473,10 +1473,18 @@ sub squid_cgi {
 	push(@tmpz, "LINE1:B_in#00EE00");
 	if(lc($config->{netstats_in_bps}) eq "y") {
 		push(@CDEF, "CDEF:B_in=in,8,*");
-		push(@CDEF, "CDEF:B_out=out,8,*");
+		if(lc($config->{netstats_mode} || "") eq "separated") {
+			push(@CDEF, "CDEF:B_out=out,8,*,-1,*");
+		} else {
+			push(@CDEF, "CDEF:B_out=out,8,*");
+		}
 	} else {
 		push(@CDEF, "CDEF:B_in=in");
-		push(@CDEF, "CDEF:B_out=out");
+		if(lc($config->{netstats_mode} || "") eq "separated") {
+			push(@CDEF, "CDEF:B_out=out,-1,*");
+		} else {
+			push(@CDEF, "CDEF:B_out=out");
+		}
 	}
 	if(lc($config->{show_gaps}) eq "y") {
 		push(@tmp, "AREA:wrongdata#$colors->{gap}:");
@@ -1572,10 +1580,18 @@ sub squid_cgi {
 	push(@tmpz, "LINE1:B_in#00EE00");
 	if(lc($config->{netstats_in_bps}) eq "y") {
 		push(@CDEF, "CDEF:B_in=in,8,*");
-		push(@CDEF, "CDEF:B_out=out,8,*");
+		if(lc($config->{netstats_mode} || "") eq "separated") {
+			push(@CDEF, "CDEF:B_out=out,8,*,-1,*");
+		} else {
+			push(@CDEF, "CDEF:B_out=out,8,*");
+		}
 	} else {
 		push(@CDEF, "CDEF:B_in=in");
-		push(@CDEF, "CDEF:B_out=out");
+		if(lc($config->{netstats_mode} || "") eq "separated") {
+			push(@CDEF, "CDEF:B_out=out,-1,*");
+		} else {
+			push(@CDEF, "CDEF:B_out=out");
+		}
 	}
 	if(lc($config->{show_gaps}) eq "y") {
 		push(@tmp, "AREA:wrongdata#$colors->{gap}:");