diff --git a/shemum b/shemum
index 2be4da8..5d21bb5 100755
--- a/shemum
+++ b/shemum
@@ -32,7 +32,7 @@ IMG_PATH="$ROOT_PATH/$OS_NAME/$OS_NAME.img"
 # Functions
 
 # Defines install image source
-def_os_source() {
+function def_os_source() {
   case $OS_NAME in
     "openbsd")
       INSTALL_IMG="https://cdn.openbsd.org/pub/OpenBSD/7.5/i386/cd75.iso"
@@ -41,41 +41,41 @@ def_os_source() {
       INSTALL_IMG=""
     ;;
     *)
-      err_func "INSTALL_IMG for $OS_NAME not found"
+      error "INSTALL_IMG for $OS_NAME not found"
     ;;
   esac
 }
 
-check_func() {
+function check() {
   if [ -z $OS_NAME ]
-    err_func "Operating system is empty"
+    error "Operating system is empty"
   fi
   if [ -z $INSTALL_IMG ]
-    info_func "$INSTALL_IMG is not set"
+    info "$INSTALL_IMG is not set"
   fi
 
 }
 
-err_func() {
+function error() {
   printf "$@" >&2
   exit 1
 }
 
-warn_func() {
+function warn() {
   printf "$@" >&2
 }
 
-info_func() {
+function info() {
   printf "$@" >&1
 }
 
 # Virtual machine removal
-remove_func() {
+function remove() {
   rm -r $ROOT_PATH/$OS_NAME 
 }
 
 # Virtual machine start without a console
-start_func() {
+function start() {
   qemu-system-x86_64 -boot c                            \
                        -display none                    \
                        -drive file=$IMG_PATH,format=raw \
@@ -83,7 +83,7 @@ start_func() {
 }
 
 # Virtual machine start with a console
-console_func() {
+function console() {
   qemu-system-x86_64 -boot c                    \
                        -display curses            \
                        -drive file=$IMG_PATH,format=raw \
@@ -91,17 +91,17 @@ console_func() {
 }
 
 # Virtual machine initialization with a console
-init_func() {
+function init() {
   def_os_source
   mkdir -p "$ROOT_PATH/$OS_NAME"
   qemu-img create $IMG_PATH $DISK_SIZE
   if [ ! -f $ISO_PATH ] && [ ! -z $INSTALL_IMG ]; then
-    info_func "Fetching $OSNAME installer at: $INSTALL_IMG"
+    info "Fetching $OSNAME installer at: $INSTALL_IMG"
     curl -o $ISO_PATH $INSTALL_IMG
   elif [ ! -z $INSTALL_IMG ]; then
-    info_func "Current INSTALL_IMG for $OS_NAME: $ISO_PATH"
+    info "Current INSTALL_IMG for $OS_NAME: $ISO_PATH"
   else
-    err_func "Install image path is missing"
+    error "Install image path is missing"
   fi
   qemu-system-x86_64 -boot d                          \
                     -display curses                   \
@@ -111,7 +111,7 @@ init_func() {
 }
 
 # Display usage
-usage_func() {
+function usage() {
   printf "Usage: shemum [init] <virtual machine name> <disk size>"
   printf " init        initialize a virtual machine"
   printf " start       start a QEMU virtual machine without console output"
@@ -122,19 +122,19 @@ usage_func() {
 # Options
 case $OPTION in
   "init")
-    init_func
+    init
   ;;
   "console")
-    console_func
+    console
   ;;
   "start")
-    start_func
+    start
   ;;
   "remove")
-    remove_func
+    remove
   ;;
   *)
-    usage_func
+    usage
 esac