diff --git a/ChangeLog b/ChangeLog
index a3ab6b0..f4bd45d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-04-18  Niibe Yutaka  <gniibe@fsij.org>
+
+	* src/configure: Fix shell syntax.
+
 2015-03-31  Niibe Yutaka  <gniibe@fsij.org>
 
 	* src/usb_conf.h (ICC_NUM_INTERFACES, HID_NUM_INTERFACES)
diff --git a/src/configure b/src/configure
index 649d779..633a50f 100755
--- a/src/configure
+++ b/src/configure
@@ -66,13 +66,13 @@ for option; do
   --disable-keygen)
     keygen=no ;;
   --enable-sys1-compat)
-    sys1_compat = yes ;;
+    sys1_compat=yes ;;
   --disable-sys1-compat)
-    sys1_compat = no ;;
+    sys1_compat=no ;;
   --enable-hid-card-change)
-    hid_card_change = yes ;;
+    hid_card_change=yes ;;
   --disable-hid-card-change)
-    hid_card_change = no ;;
+    hid_card_change=no ;;
   --with-dfu)
     with_dfu=yes ;;
   --without-dfu)