diff --git a/debian/changelog b/debian/changelog
index 73dde35..e7d65f6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+wmcalclock (1.25-16.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix ftbfs with GCC-10. (Closes: #957941)
+
+ -- Sudip Mukherjee <sudipm.mukherjee@gmail.com>  Fri, 31 Jul 2020 12:11:07 +0100
+
 wmcalclock (1.25-16) unstable; urgency=low
 
   * Remove deprecated dpatch and upgrade to packaging format "3.0 quilt".
diff --git a/debian/patches/05-fix-ftbfs.patch b/debian/patches/05-fix-ftbfs.patch
new file mode 100644
index 0000000..dcf38d7
--- /dev/null
+++ b/debian/patches/05-fix-ftbfs.patch
@@ -0,0 +1,41 @@
+Description: Fix ftbfs with GCC-10
+
+Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
+Bug-Debian: https://bugs.debian.org/957941
+Forwarded: no
+
+---
+
+--- wmcalclock-1.25.orig/Src/xutils.c
++++ wmcalclock-1.25/Src/xutils.c
+@@ -53,6 +53,11 @@ GC          NormalGC;
+ XpmIcon               wmgen;
+ Pixmap                pixmask;
+
++Display               *display;
++Window                Root;
++Window                iconwin, win;
++int           screen;
++int           DisplayDepth;
+
+ /*
+  *  Colors for wmCalClock
+--- wmcalclock-1.25.orig/Src/xutils.h
++++ wmcalclock-1.25/Src/xutils.h
+@@ -18,11 +18,11 @@ typedef struct {
+ /*
+  *   Global variable
+  */
+-Display               *display;
+-Window          Root;
+-Window          iconwin, win;
+-int             screen;
+-int             DisplayDepth;
++extern Display                *display;
++extern Window         Root;
++extern Window         iconwin, win;
++extern int            screen;
++extern int            DisplayDepth;
+
+
+
diff --git a/debian/patches/series b/debian/patches/series
index 7f8ba94..1e030c2 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -3,3 +3,4 @@
 02-30hr-patch.patch
 03-manapge-30hr-patch.patch
 04-makefile-modifications.patch
+05-fix-ftbfs.patch