diff --git a/debian/changelog b/debian/changelog
index fd300d7..dfc5f18 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+mozc (2.23.2815.102+dfsg-6) UNRELEASED; urgency=medium
+
+  * Add d/patches/Add-support-verbose-build.patch
+    Enable verbose build on ninja.
+
+ -- Nobuhiro Iwamatsu <iwamatsu@debian.org>  Wed, 24 Jul 2019 20:00:08 +0900
+
 mozc (2.23.2815.102+dfsg-5) unstable; urgency=medium
 
   * Update debian/rules.
diff --git a/debian/patches/Add-support-verbose-build.patch b/debian/patches/Add-support-verbose-build.patch
new file mode 100644
index 0000000..fb43286
--- /dev/null
+++ b/debian/patches/Add-support-verbose-build.patch
@@ -0,0 +1,23 @@
+From f1f2ca394669108533261ae2613ab535266d6823 Mon Sep 17 00:00:00 2001
+From: Nobuhiro Iwamatsu <iwamatsu@debian.org>
+Date: Wed, 24 Jul 2019 04:00:24 +0900
+Subject: [PATCH] Add support verbose build
+
+Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@debian.org>
+---
+ src/build_mozc.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/build_mozc.py b/src/build_mozc.py
+index 46fa0827..51e1e2e4 100644
+--- a/src/build_mozc.py
++++ b/src/build_mozc.py
+@@ -825,7 +825,7 @@ def BuildWithNinja(options, targets):
+   ninja = GetNinjaPath()
+ 
+   ninja_targets = [GetNinjaTargetName(target) for target in targets]
+-  RunOrDie([ninja, '-C', build_arg] + ninja_targets)
++  RunOrDie([ninja, '-v', '-C', build_arg] + ninja_targets)
+ 
+ 
+ def BuildOnWindows(targets):
diff --git a/debian/patches/series b/debian/patches/series
index 1e5e070..68106cd 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -5,3 +5,4 @@
 Fix-build-with-gcc8.patch
 usage_dict.txt.patch
 add_support_new_japanese_era.patch
+Add-support-verbose-build.patch