diff --git a/debian/changelog b/debian/changelog
index 2b83e7aa..b0d6b3d0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+llvm-toolchain-11 (1:11.1.0-2) unstable; urgency=medium
+
+  * Disable lto. Hopefully workaround the issue
+    https://bugs.llvm.org/show_bug.cgi?id=50031
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Thu, 22 Apr 2021 22:08:49 +0200
+
 llvm-toolchain-11 (1:11.1.0-1) unstable; urgency=medium
 
   * New upstream release
diff --git a/debian/rules b/debian/rules
index 5af91639..a3779557 100755
--- a/debian/rules
+++ b/debian/rules
@@ -65,7 +65,7 @@ endif
 
 # Ensure fixfilepath feature is disabled.  The fixfilepath feature
 # sets a -ffile-prefix-map flag, which is only supported in clang-10.
-export DEB_BUILD_MAINT_OPTIONS=reproducible=-fixfilepath
+export DEB_BUILD_MAINT_OPTIONS=reproducible=-fixfilepath optimize=-lto
 
 # Cxx flags for building libcxx and libcxxabi
 LIBCXXFLAGS := $(shell dpkg-buildflags --get CXXFLAGS) $(shell dpkg-buildflags --get CPPFLAGS)