diff --git a/ChangeLog b/ChangeLog
index 05c8e4d..91b8dde 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2017-02-02  NIIBE Yutaka  <gniibe@fsij.org>
 
+	* src/gnuk.ld.in (__process1_stack_size__): Increase by 0x20.
 	* chopstx: Update to 1.3.
 	* src/configure: Add BLUE_PILL in the help message.
 
diff --git a/src/gnuk.ld.in b/src/gnuk.ld.in
index b0044d0..2d0dcb1 100644
--- a/src/gnuk.ld.in
+++ b/src/gnuk.ld.in
@@ -3,7 +3,7 @@
  */
 __main_stack_size__      = 0x0080;      /* Exception handlers     */
 __process0_stack_size__  = 0x0100;      /* main */
-__process1_stack_size__  = 0x0180;      /* ccid */
+__process1_stack_size__  = 0x01a0;      /* ccid */
 __process2_stack_size__  = 0x0180;      /* rng */
 __process3_stack_size__  = 0x1640;      /* gpg */
 __process4_stack_size__  = 0;           /* --- */