diff --git a/src/async.zsh b/src/async.zsh
index d13e35a..d08d944 100644
--- a/src/async.zsh
+++ b/src/async.zsh
@@ -16,7 +16,7 @@ _zsh_autosuggest_async_request() {
 
 		# We won't know the pid unless the user has zsh/system module installed
 		if (( _ZSH_AUTOSUGGEST_CHILD_PID )); then
-			kill -TERM $_ZSH_AUTOSUGGEST_CHILD_PID 2>/dev/null
+			kill -TERM -- $_ZSH_AUTOSUGGEST_CHILD_PID 2>/dev/null
 		fi
 	fi
 
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index b3f2522..bd5aa3c 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -771,7 +771,7 @@ _zsh_autosuggest_async_request() {
 
 		# We won't know the pid unless the user has zsh/system module installed
 		if (( _ZSH_AUTOSUGGEST_CHILD_PID )); then
-			kill -TERM $_ZSH_AUTOSUGGEST_CHILD_PID 2>/dev/null
+			kill -TERM -- $_ZSH_AUTOSUGGEST_CHILD_PID 2>/dev/null
 		fi
 	fi