diff --git a/completion/available/system.completion.bash b/completion/available/system.completion.bash
index b044627c..f9a3b29f 100644
--- a/completion/available/system.completion.bash
+++ b/completion/available/system.completion.bash
@@ -20,8 +20,8 @@ if [ $(uname) = "Darwin" ] && command -v brew &>/dev/null ; then
     . "$BREW_PREFIX"/etc/bash_completion
   fi
 
-  # homebrew/versions/bash-completion2 (required for projects.completion.bash) is installed to this path
-  if [ -f "$BREW_PREFIX"/share/bash-completion/bash_completion ]; then
+ # homebrew/versions/bash-completion2 (required for projects.completion.bash) is installed to this path
+  if [ "${BASH_VERSINFO}" -ge 4 ] && [ -f "$BREW_PREFIX"/share/bash-completion/bash_completion ]; then
     . "$BREW_PREFIX"/share/bash-completion/bash_completion
   fi
 fi