diff --git a/kernel/syscall.c b/kernel/syscall.c
index b817109d..4997bbe3 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -492,36 +492,35 @@ SYSCALL_DECLARE(brk)
 {
 	unsigned long address = ihk_mc_syscall_arg0(ctx);
 	struct vm_regions *region = &cpu_local_var(current)->vm->region;
-    unsigned long r;
+	unsigned long r;
 
-    dkprintf("SC(%d)[sys_brk] brk_start=%lx,end=%lx\n", ihk_mc_get_processor_id(), region->brk_start, region->brk_end);
+	dkprintf("SC(%d)[sys_brk] brk_start=%lx,end=%lx\n",
+			ihk_mc_get_processor_id(), region->brk_start, region->brk_end);
 
-    /* brk change fail, including glibc trick brk(0) to obtain current brk */
-    if(address < region->brk_start) {
-        r = region->brk_end;
-        goto out;
-    }
+	/* brk change fail, including glibc trick brk(0) to obtain current brk */
+	if(address < region->brk_start) {
+		r = region->brk_end;
+		goto out;
+	}
 
-    /* brk change fail, because we don't shrink memory region  */
-    if(address < region->brk_end) {
-        r = region->brk_end;
-        goto out;
-    }
+	/* brk change fail, because we don't shrink memory region  */
+	if(address < region->brk_end) {
+		r = region->brk_end;
+		goto out;
+	}
 
-    /* try to extend memory region */
-    ihk_mc_spinlock_lock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
-    region->brk_end = 
-        extend_process_region(cpu_local_var(current),
-                              region->brk_start, region->brk_end,
-                              address, 0);
-    ihk_mc_spinlock_unlock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
-    dkprintf("SC(%d)[sys_brk] brk_end set to %lx\n", ihk_mc_get_processor_id(), region->brk_end);
-    
-    r = region->brk_end;    
+	/* try to extend memory region */
+	ihk_mc_spinlock_lock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
+	region->brk_end = extend_process_region(cpu_local_var(current),
+			region->brk_start, region->brk_end, address, 0);
+	ihk_mc_spinlock_unlock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
+	dkprintf("SC(%d)[sys_brk] brk_end set to %lx\n",
+			ihk_mc_get_processor_id(), region->brk_end);
 
-    out:
+	r = region->brk_end;
+
+out:
 	return r;
-
 }
 
 SYSCALL_DECLARE(getpid)