diff --git a/sys/powerpc/booke/booke_machdep.c b/sys/powerpc/booke/booke_machdep.c
index 103c18c14b20..c49e335f7a66 100644
--- a/sys/powerpc/booke/booke_machdep.c
+++ b/sys/powerpc/booke/booke_machdep.c
@@ -372,7 +372,7 @@ booke_init(u_long arg1, u_long arg2)
 	return (ret);
 }
 
-#define RES_GRANULE 32
+#define RES_GRANULE cacheline_size
 extern uintptr_t tlb0_miss_locks[];
 
 /* Initialise a struct pcpu. */
diff --git a/sys/powerpc/booke/trap_subr.S b/sys/powerpc/booke/trap_subr.S
index 55564adbd24a..92ce1ebaa3ab 100644
--- a/sys/powerpc/booke/trap_subr.S
+++ b/sys/powerpc/booke/trap_subr.S
@@ -82,7 +82,7 @@
 /* Get the per-CPU data structure */
 #define GET_CPUINFO(r) mfsprg0 r
 
-#define RES_GRANULE	32
+#define RES_GRANULE	64
 #define RES_LOCK	0	/* offset to the 'lock' word */
 #ifdef __powerpc64__
 #define RES_RECURSE	8	/* offset to the 'recurse' word */