diff --git a/server/bootserver.go b/server/bootserver.go
index 6b1ef1bc..a9f90609 100644
--- a/server/bootserver.go
+++ b/server/bootserver.go
@@ -154,8 +154,8 @@ func handleIgnitionIPXEBoot(w http.ResponseWriter, r *http.Request, k8sClient cl
 	}
 
 	if len(ipxeBootConfigList.Items) == 0 {
-		//Some OSes standardizes SystemUUIDs to lowercase, which may cause mismatches.
-		if err := k8sClient.List(ctx, ipxeBootConfigList, client.MatchingFields{bootv1alpha1.SystemUUIDIndexKey: strings.ToLower(uuid)}); err != nil {
+		//Some OSes standardizes SystemUUIDs to uppercase, which may cause mismatches.
+		if err := k8sClient.List(ctx, ipxeBootConfigList, client.MatchingFields{bootv1alpha1.SystemUUIDIndexKey: strings.ToUpper(uuid)}); err != nil {
 			http.Error(w, "Resource Not Found", http.StatusNotFound)
 			log.Info("Failed to find IPXEBootConfig", "error", err.Error())
 			return
@@ -232,8 +232,8 @@ func handleIgnitionHTTPBoot(w http.ResponseWriter, r *http.Request, k8sClient cl
 	}
 
 	if len(HTTPBootConfigList.Items) == 0 {
-		//Some OSes standardizes SystemUUIDs to lowercase, which may cause mismatches.
-		if err := k8sClient.List(ctx, HTTPBootConfigList, client.MatchingFields{bootv1alpha1.SystemUUIDIndexKey: strings.ToLower(uuid)}); err != nil {
+		//Some OSes standardizes SystemUUIDs to uppercase, which may cause mismatches.
+		if err := k8sClient.List(ctx, HTTPBootConfigList, client.MatchingFields{bootv1alpha1.SystemUUIDIndexKey: strings.ToUpper(uuid)}); err != nil {
 			http.Error(w, "Resource Not Found", http.StatusNotFound)
 			log.Info("Failed to find HTTPBootConfigList", "error", err.Error())
 			return