diff --git a/gnu/gcc/gcc/config/m88k/m88k.h b/gnu/gcc/gcc/config/m88k/m88k.h
index 542c77cb3c6..da18748efde 100644
--- a/gnu/gcc/gcc/config/m88k/m88k.h
+++ b/gnu/gcc/gcc/config/m88k/m88k.h
@@ -108,7 +108,7 @@ extern enum processor_type m88k_cpu;
 #define VERSION_INFO	"m88k"
 #define TARGET_VERSION fprintf (stderr, " (%s)", VERSION_INFO)
 
-#define TARGET_DEFAULT		(MASK_CHECK_ZERO_DIV)
+#define TARGET_DEFAULT		(MASK_CHECK_ZERO_DIV | MASK_SERIALIZE_VOLATILE)
 #define CPU_DEFAULT		MASK_88100
 
 #define OVERRIDE_OPTIONS	m88k_override_options ()
diff --git a/gnu/gcc/gcc/config/m88k/m88k.opt b/gnu/gcc/gcc/config/m88k/m88k.opt
index 8fa6200866f..37ed777642c 100644
--- a/gnu/gcc/gcc/config/m88k/m88k.opt
+++ b/gnu/gcc/gcc/config/m88k/m88k.opt
@@ -49,7 +49,7 @@ Target Report RejectNegative Mask(USE_DIV)
 Use the \"div\" instruction for signed integer divide
 
 mserialize-volatile
-Target Report Mask(SERIALIZE_VOLATILE) Init(1)
+Target Report Mask(SERIALIZE_VOLATILE)
 Force serialization on volatile memory access
 
 mmemcpy