diff --git a/mupdf.changes b/mupdf.changes
index 5c1c0c8..6333dec 100644
--- a/mupdf.changes
+++ b/mupdf.changes
@@ -1,4 +1,8 @@
 -------------------------------------------------------------------
+Mon Apr 29 13:13:20 UTC 2013 - gber@opensuse.org
+
+- fix broken setting of CFLAGS introduced by the previous change
+-------------------------------------------------------------------
 Sun Apr 28 10:28:56 UTC 2013 - dap.darkness@gmail.com
 
 - Fixed "ld: relocation R_X86_64_32 against `.rodata' can not
diff --git a/mupdf.spec b/mupdf.spec
index 4b87691..c8c27c9 100644
--- a/mupdf.spec
+++ b/mupdf.spec
@@ -65,8 +65,8 @@ based on mupdf.
 rm -rf thirdparty
 
 %build
-export CFLAGS="%{optflags} -fPIC"
-export XCFLAGS="%{optflags}"
+# do no set CFLAGS which is used by the build system itself!
+export XCFLAGS="%{optflags} -fPIC"
 make %{?_smp_mflags} verbose=1
 ls -1 build/debug