diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 75bcebd476..c5a3084785 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -3009,9 +3009,9 @@ DEFINE XCODE5_RODATA_ARGS   = DEF(XCODE5_RORELOCS_ARGS) -segprot __DATA_CONST r-
 # MTOC definitions
 ##################
 
-  DEBUG_XCODE5_*_MTOC_FLAGS = -align 0x1000 -d $(DEBUG_DIR)/$(MODULE_NAME).dll
-  NOOPT_XCODE5_*_MTOC_FLAGS = -align 0x1000 -d $(DEBUG_DIR)/$(MODULE_NAME).dll
-RELEASE_XCODE5_*_MTOC_FLAGS = -align 0x1000
+  DEBUG_XCODE5_*_MTOC_FLAGS = -align 0x1000 -d $(DEBUG_DIR)/$(MODULE_NAME).dll -require_read_only_relocs
+  NOOPT_XCODE5_*_MTOC_FLAGS = -align 0x1000 -d $(DEBUG_DIR)/$(MODULE_NAME).dll -require_read_only_relocs
+RELEASE_XCODE5_*_MTOC_FLAGS = -align 0x1000 -require_read_only_relocs
 
 ####################
 # IA-32 definitions