diff --git a/control-vm.sh b/control-vm.sh
index 6f71e6d..29a032d 100755
--- a/control-vm.sh
+++ b/control-vm.sh
@@ -67,7 +67,7 @@
 
 __VERSION__="0.0.0"
 
-set_params(){
+function set_params(){
   # === Define default values ===
   CLIPBOARD="${CLIPBOARD:-}"
   CPU_CORES="${CPU_CORES:-8}"
@@ -193,7 +193,7 @@ set_params(){
   fi
 }
 # === Define functions for the actual QEMU controlling. ===
-start_qemu(){
+function start_qemu(){
     if [[ ! -f "${PID_FILE}" ]]; then
         echo "Starting VM ${GUEST_NAME}."
         # Define the default architecture.
@@ -211,7 +211,7 @@ start_qemu(){
         echo "See ${PID_FILE} for the process ID."
     fi
 }
-shutdown_qemu(){
+function shutdown_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         echo "Requesting shutdown for VM ${GUEST_NAME}."
         echo "system_powerdown" | socat - unix-connect:"${MONITOR_SOCKET}"
@@ -219,7 +219,7 @@ shutdown_qemu(){
         echo "Looks as VM ${GUEST_NAME} is already stopped."
     fi
 }
-stop_qemu(){
+function stop_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         echo "Forcing shutdown of VM ${GUEST_NAME}."
         echo "quit" | socat - unix-connect:"${MONITOR_SOCKET}"
@@ -227,7 +227,7 @@ stop_qemu(){
         echo "Looks as VM ${GUEST_NAME} is already stopped."
     fi
 }
-connect_to_vm(){
+function connect_to_vm(){
     if [[ -f "${PID_FILE}" ]]; then
         echo "Opening a GUI for ${GUEST_NAME}."
         local REMOTE_VIEWER_OPTS=(
@@ -247,7 +247,7 @@ connect_to_vm(){
         echo "Looks as VM ${GUEST_NAME} is not running."
     fi
 }
-save_qemu(){
+function save_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         SNAPSHOT_NAME="snap$(date --utc +%s)"
         echo "Saving state of VM ${GUEST_NAME}."
@@ -257,7 +257,7 @@ save_qemu(){
         echo "Guest ${GUEST_NAME} is not running."
     fi
 }
-pause_qemu(){
+function pause_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         echo "Pausing the VM ${GUEST_NAME}."
         echo "stop" | socat - unix-connect:"${MONITOR_SOCKET}"
@@ -265,7 +265,7 @@ pause_qemu(){
         echo "Guest ${GUEST_NAME} not running, nothing to pause."
     fi
 }
-restore_qemu(){
+function restore_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         SNAPSHOT_NAME="$(cat "${SNAPSHOT_INFO_FILE}")"
         echo "Restore state of VM ${GUEST_NAME}."
@@ -276,7 +276,7 @@ restore_qemu(){
         echo "Guest ${GUEST_NAME} is not running, nothing to restore."
     fi
 }
-resume_qemu(){
+function resume_qemu(){
     if [[ -f "${PID_FILE}" ]]; then
         echo "Resuming the VM ${GUEST_NAME}."
         echo "cont" | socat - unix-connect:"${MONITOR_SOCKET}"
@@ -284,7 +284,7 @@ resume_qemu(){
         echo "Guest ${GUEST_NAME} is not running, nothing to resume."
     fi
 }
-print_help(){
+function print_help(){
     echo " ======================================================================="
     echo " control-vm.sh - simple QEMU/KVM vm manager"
     echo "    version: ${__VERSION__}"