diff --git a/configure.ac b/configure.ac
index 7d8e4a7..af400ab 100755
--- a/configure.ac
+++ b/configure.ac
@@ -189,8 +189,8 @@ AM_COND_IF([USE_RADOS_AIORI],[
 AC_MSG_CHECKING([for Gfarm file system])
 AC_ARG_WITH([gfarm],
   [AS_HELP_STRING([--with-gfarm=GFARM_ROOT],
-    [support IO with libgfarm backend @<:@default=no@:>@])],
-    [], [with_gfarm=no])
+    [support IO with Gfarm backend @<:@default=no@:>@])],
+  [], [with_gfarm=no])
 AC_MSG_RESULT([$with_gfarm])
 AM_CONDITIONAL([USE_GFARM_AIORI], [test x$with_gfarm != xno])
 if test x$with_gfarm != xno; then
diff --git a/src/aiori-Gfarm.c b/src/aiori-Gfarm.c
index cc835f1..a7af0ea 100644
--- a/src/aiori-Gfarm.c
+++ b/src/aiori-Gfarm.c
@@ -77,7 +77,7 @@ Gfarm_xfer(int access, void *fd, IOR_size_t *buffer, IOR_offset_t len,
 #define MAX_SZ	(1024 * 1024 * 1024)
 	int sz, n;
 	char *buf = (char *)buffer;
-	
+
 	if (param->dryRun)
 		return (len);
 
@@ -109,7 +109,7 @@ Gfarm_close(void *fd, IOR_param_t *param)
 {
 	struct gfarm_file *fp = fd;
 
-	if(param->dryRun)
+	if (param->dryRun)
 		return;
 
 	if (gfs_pio_close(fp->gf) != GFARM_ERR_NO_ERROR)
@@ -141,7 +141,7 @@ Gfarm_fsync(void *fd, IOR_param_t *param)
 {
 	struct gfarm_file *fp = fd;
 
-	if(param->dryRun)
+	if (param->dryRun)
 		return;
 
 	if (gfs_pio_sync(fp->gf) != GFARM_ERR_NO_ERROR)
@@ -213,7 +213,7 @@ Gfarm_mkdir(const char *fn, mode_t mode, IOR_param_t *param)
 	if (param->dryRun)
 		return (0);
 
-        e = gfs_mkdir(fn, mode);
+	e = gfs_mkdir(fn, mode);
 	if (e == GFARM_ERR_NO_ERROR)
 		return (0);
 	errno = gfarm_error_to_errno(e);
@@ -228,7 +228,7 @@ Gfarm_rmdir(const char *fn, IOR_param_t *param)
 	if (param->dryRun)
 		return (0);
 
-        e = gfs_rmdir(fn);
+	e = gfs_rmdir(fn);
 	if (e == GFARM_ERR_NO_ERROR)
 		return (0);
 	errno = gfarm_error_to_errno(e);