diff --git a/debian/patches/0001-Link-libm.patch b/debian/patches/0001-Link-libm.patch
new file mode 100644
index 0000000..f039c2d
--- /dev/null
+++ b/debian/patches/0001-Link-libm.patch
@@ -0,0 +1,21 @@
+From: Sebastian Ramacher <sramacher@debian.org>
+Date: Wed, 8 Nov 2017 21:33:54 +0100
+Subject: Link libm
+
+---
+ configure.ac | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/configure.ac b/configure.ac
+index 2e5c692..71843be 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -13,6 +13,8 @@ AC_PROG_MAKE_SET
+ LT_INIT
+ 
+ # Checks for libraries.
++AC_SEARCH_LIBS(sqrt, m)
++
+ pkg_requires=""
+ PKG_CHECK_MODULES(PNG, "libpng", [
+   AC_DEFINE(HAVE_PNG, 1, "have libpng")
diff --git a/debian/patches/series b/debian/patches/series
new file mode 100644
index 0000000..5564a58
--- /dev/null
+++ b/debian/patches/series
@@ -0,0 +1 @@
+0001-Link-libm.patch