diff --git a/makerom/Makefile b/makerom/Makefile
index 9af706b..f4f6faf 100644
--- a/makerom/Makefile
+++ b/makerom/Makefile
@@ -3,7 +3,7 @@ SRC_DIR = . polarssl libyaml
 OBJS = $(foreach dir,$(SRC_DIR),$(subst .c,.o,$(wildcard $(dir)/*.c)))
 
 # Compiler Settings
-CFLAGS = --std=c99 -O2 -flto -Wall -Wno-unused-value -Wno-unused-result -I.
+CFLAGS = --std=c99 -O2 -Wall -Wno-unused-value -Wno-unused-result -I.
 CC = gcc
 ifeq ($(OS),Windows_NT)
     #Windows Build CFG
diff --git a/makerom/titleid.c b/makerom/titleid.c
index 251282b..aea6a15 100644
--- a/makerom/titleid.c
+++ b/makerom/titleid.c
@@ -61,6 +61,11 @@ int GetProgramID(u64 *dest, rsf_settings *rsf, bool IsForExheader)
 	else
 		uniqueId = DEFAULT_UNIQUE_ID;
 
+	if(uniqueId & 0xFFF00000u){
+		fprintf(stderr,"[ID ERROR] Unique ID is out of range.\n");
+		return PID_BAD_RSF_SET;
+	}
+
 	// Getting Variation
 	if(SetTitleVariation(&variation,category,rsf) == PID_INVALID_VARIATION)
 		return PID_BAD_RSF_SET;