diff --git a/libraw.changes b/libraw.changes
index febb85b..5de9a9c 100644
--- a/libraw.changes
+++ b/libraw.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Jan  8 13:22:31 UTC 2019 - Petr Gajdos <pgajdos@suse.com>
+
+- asan_build: build ASAN included
+- debug_build: build more suitable for debugging
+
 -------------------------------------------------------------------
 Mon Dec 31 15:37:08 UTC 2018 - Petr Gajdos <pgajdos@suse.com>
 
diff --git a/libraw.spec b/libraw.spec
index 9d20f82..6fae091 100644
--- a/libraw.spec
+++ b/libraw.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libraw
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,6 +16,9 @@
 #
 
 
+%define debug_build   0
+%define asan_build    0
+
 %define tar_name LibRaw
 %define lver    19
 %define lname	libraw%{lver}
@@ -102,10 +105,18 @@ against LibRaw. LibRaw does not provide dynamic libraries.
 %patch1 -p1
 
 %build
-export CXXFLAGS="%optflags -fPIC -DUSE_ZLIB"
+export CXXFLAGS="%{optflags} -fPIC -DUSE_ZLIB"
+%if %{debug_build}
+export CXXFLAGS="$CXXFLAGS -O0"
+%endif
 export LIBS="$LIBS -lz"
 autoreconf -fi
 %configure
+%if %{asan_build}
+sed -i -e 's/\(^CXXFLAGS =.*\)/\1 -fsanitize=address/' \
+       -e 's/\(^LIBS =.*\)/\1 -lasan/' \
+       Makefile
+%endif
 make %{?_smp_mflags}
 
 %install