diff --git a/extensions/libxt_geoip.c b/extensions/libxt_geoip.c
index c99d7ea..df28185 100644
--- a/extensions/libxt_geoip.c
+++ b/extensions/libxt_geoip.c
@@ -58,9 +58,9 @@ static struct geoip_subnet *geoip_get_subnets(const char *code, uint32_t *count)
 
 	/* Use simple integer vector files */
 #if __BYTE_ORDER == _BIG_ENDIAN
-	snprintf(buf, sizeof(buf), GEOIP_DB_DIR "/BE/%s.iv0", code);
+	snprintf(buf, sizeof(buf), GEOIP_DB_DIR "/BE/%s.iv4", code);
 #else
-	snprintf(buf, sizeof(buf), GEOIP_DB_DIR "/LE/%s.iv0", code);
+	snprintf(buf, sizeof(buf), GEOIP_DB_DIR "/LE/%s.iv4", code);
 #endif
 
 	if ((fd = open(buf, O_RDONLY)) < 0) {
diff --git a/geoip/xt_geoip_build b/geoip/xt_geoip_build
index 4ba5404..5016ff3 100755
--- a/geoip/xt_geoip_build
+++ b/geoip/xt_geoip_build
@@ -33,9 +33,12 @@ foreach (qw(LE BE)) {
 
 while (my $row = $csv->getline(*ARGV)) {
 	if (!defined($country{$row->[4]})) {
-		$country{$row->[4]} = {name => $row->[5], pool => []};
+		$country{$row->[4]} = {
+			name => $row->[5],
+			pool_v4 => [],
+		};
 	}
-	my $c = $country{$row->[4]}{pool};
+	my $c = $country{$row->[4]}{pool_v4};
 	push(@$c, [$row->[2], $row->[3]]);
 	if ($. % 4096 == 0) {
 		print STDERR "\r\e[2K$. entries";
@@ -47,21 +50,21 @@ print STDERR "\r\e[2K$. entries total\n";
 foreach my $iso_code (sort keys %country) {
 	my($file, $fh_le, $fh_be);
 
-	printf "%5u ranges for %s %s\n",
-		scalar(@{$country{$iso_code}{pool}}),
+	printf "%5u IPv4 ranges for %s %s\n",
+		scalar(@{$country{$iso_code}{pool_v4}}),
 		$iso_code, $country{$iso_code}{name};
 
-	$file = "$target_dir/LE/".uc($iso_code).".iv0";
+	$file = "$target_dir/LE/".uc($iso_code).".iv4";
 	if (!open($fh_le, "> $file")) {
 		print STDERR "Error opening $file: $!\n";
 		exit 1;
 	}
-	$file = "$target_dir/BE/".uc($iso_code).".iv0";
+	$file = "$target_dir/BE/".uc($iso_code).".iv4";
 	if (!open($fh_be, "> $file")) {
 		print STDERR "Error opening $file: $!\n";
 		exit 1;
 	}
-	foreach my $range (@{$country{$iso_code}{pool}}) {
+	foreach my $range (@{$country{$iso_code}{pool_v4}}) {
 		print $fh_le pack("VV", $range->[0], $range->[1]);
 		print $fh_be pack("NN", $range->[0], $range->[1]);
 	}