diff --git a/src/strategies/match_prev_cmd.zsh b/src/strategies/match_prev_cmd.zsh
index ee26346..a1cb696 100644
--- a/src/strategies/match_prev_cmd.zsh
+++ b/src/strategies/match_prev_cmd.zsh
@@ -26,7 +26,7 @@ _zsh_autosuggest_strategy_match_prev_cmd() {
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
 	local history_match_keys
-	history_match_keys=(${(k)history[(R)$prefix*]})
+  history_match_keys=(${(k)history[(R)${(q)prefix}*]})
 
 	# By default we use the first history number (most recent history entry)
 	local histkey="${history_match_keys[1]}"
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index 9ea5960..38a26df 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -533,7 +533,7 @@ _zsh_autosuggest_strategy_match_prev_cmd() {
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
 	local history_match_keys
-	history_match_keys=(${(k)history[(R)$prefix*]})
+  history_match_keys=(${(k)history[(R)${(q)prefix}*]})
 
 	# By default we use the first history number (most recent history entry)
 	local histkey="${history_match_keys[1]}"