diff --git a/libraw.spec b/libraw.spec
index 2fdb3e2..a30edd4 100644
--- a/libraw.spec
+++ b/libraw.spec
@@ -47,7 +47,7 @@ LibRaw is based on the source codes of the dcraw utility, where part of
 drawbacks have already been eliminated and part will be fixed in future.
 
 %package tools
-Summary:        Library for reading RAW files obtained from digital photo cameras -- Tools
+Summary:        Tools for reading RAW files obtained from digital photo cameras
 Group:          Productivity/Graphics/Other
 
 %description tools
@@ -100,8 +100,7 @@ against LibRaw. LibRaw does not provide dynamic libraries.
 
 %build
 export CXXFLAGS="%optflags -fPIC -DUSE_ZLIB"
-# manually add linker flags for zlib:
-export LDFLAGS="$LDFLAGS -lz"
+export LIBS="$LIBS -lz"
 %configure
 # build env is too broken for parallel build
 make %{?_smp_mflags}