diff --git a/blockcheck.sh b/blockcheck.sh
index e3e961c..8d45704 100755
--- a/blockcheck.sh
+++ b/blockcheck.sh
@@ -48,8 +48,6 @@ PF_RULES_SAVE=/tmp/pf-zapret-save.conf
 
 unset ALL_PROXY
 
-setup_md5
-
 killwait()
 {
 	# $1 - signal (-9, -2, ...)
diff --git a/common/base.sh b/common/base.sh
index 1ab51ca..959db96 100644
--- a/common/base.sh
+++ b/common/base.sh
@@ -277,6 +277,7 @@ replace_char()
 
 setup_md5()
 {
+	[ -n "$MD5" ] && return
 	MD5=md5sum
 	exists $MD5 || MD5=md5
 }
@@ -285,6 +286,7 @@ random()
 {
 	# $1 - min, $2 - max
 	local r rs
+	setup_md5
 	if [ -c /dev/urandom ]; then
 		read rs </dev/urandom
 	else
diff --git a/install_easy.sh b/install_easy.sh
index 8d16d98..9e4b753 100755
--- a/install_easy.sh
+++ b/install_easy.sh
@@ -24,8 +24,6 @@ GET_LIST="$IPSET_DIR/get_config.sh"
 
 [ -n "$TPPORT" ] || TPPORT=988
 
-setup_md5
-
 check_readonly_system()
 {
 	local RO