diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
index 31220d7..abdcecf 100644
--- a/zsh-syntax-highlighting.zsh
+++ b/zsh-syntax-highlighting.zsh
@@ -36,6 +36,7 @@ local zsh_highlight__aliases="`builtin alias -Lm '[^+]*'`"
 # Hence, we exclude them from unaliasing:
 builtin unalias -m '[^+]*'
 
+emulate -L zsh
 setopt localoptions warncreateglobal
 
 # Set $0 to the expected value, regardless of functionargzero.