diff --git a/lib/utils.sh b/lib/utils.sh
index 30764e96b..fdc6b41dd 100644
--- a/lib/utils.sh
+++ b/lib/utils.sh
@@ -73,7 +73,6 @@
 ################################################################################
 
 _omb_version=10000
-_omb_bash_version=$((BASH_VERSINFO[0] * 10000 + BASH_VERSINFO[1] * 100 + BASH_VERSINFO[2]))
 
 function _omb_util_setexit {
   return "$1"
@@ -93,7 +92,7 @@ function __omb_util_defun_deprecate__message {
 
 function _omb_util_defun_deprecate {
   local warning=
-  ((_omb_version>=$1)) &&
+  ((_omb_version >= $1)) &&
     warning='__omb_util_defun_deprecate__message "$2" "$3"; '
   builtin eval -- "function $2 { $warning$3 \"\$@\"; }"
 }
diff --git a/oh-my-bash.sh b/oh-my-bash.sh
index 49c5c91e1..4cffb3351 100644
--- a/oh-my-bash.sh
+++ b/oh-my-bash.sh
@@ -10,6 +10,17 @@ case $- in
     *) return;;
 esac
 
+if [ ! -n "${BASH_VERSION-}" ]; then
+  printf '%s\n' 'oh-my-bash: This is not a Bash. Use OMB with Bash 3.2 or higher.' >&2
+  return 1
+fi
+_omb_bash_version=$((BASH_VERSINFO[0] * 10000 + BASH_VERSINFO[1] * 100 + BASH_VERSINFO[2]))
+if ((_omb_bash_version < 30200)); then
+  printf '%s\n' "oh-my-bash: OMB does not support this version of Bash ($BASH_VERSION)" >&2
+  printf '%s\n' "oh-my-bash: Use OMB with Bash 3.2 or higher" >&2
+  return 1
+fi
+
 # Check for updates on initial load...
 if [[ $DISABLE_AUTO_UPDATE != true ]]; then
   source "$OSH"/tools/check_for_upgrade.sh