diff --git a/debian/changelog b/debian/changelog
index bafb76f..fceb110 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+fractgen (2.1.5-1.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Do not build with -Werror. (Closes: #964627)
+
+ -- Adrian Bunk <bunk@debian.org> Fri, 05 Feb 2021 10:01:15 +0200
+
fractgen (2.1.5-1) unstable; urgency=medium
* New upstream release.
diff --git a/debian/patches/no_werror.patch b/debian/patches/no_werror.patch
new file mode 100644
index 0000000..62fc977
--- /dev/null
+++ b/debian/patches/no_werror.patch
@@ -0,0 +1,17 @@
+Description: Do not build with -Werror
+Author: Adrian Bunk <bunk@debian.org>
+Bug-Debian: https://bugs.debian.org/964627
+
+--- fractgen-2.1.5.orig/CMakeLists.txt
++++ fractgen-2.1.5/CMakeLists.txt
+@@ -112,8 +112,8 @@ SET(CMAKE_C_STANDARD 11)
+ SET(CMAKE_C_STANDARD_REQUIRED ON)
+ SET(CMAKE_C_EXTENSIONS OFF)
+
+-SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror")
+-SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror")
++SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
++SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+
+ IF (CMAKE_BUILD_TYPE MATCHES DEBUG)
+ MESSAGE(STATUS "Building in DEBUG mode")
diff --git a/debian/patches/series b/debian/patches/series
index 1102afc..2766223 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
add_desktop.patch
+no_werror.patch
