diff --git a/netsniff-ng-optflags.patch b/netsniff-ng-optflags.patch
new file mode 100644
index 0000000..c3eedf4
--- /dev/null
+++ b/netsniff-ng-optflags.patch
@@ -0,0 +1,23 @@
+--- src/CMakeLists.txt.orig	2012-03-30 06:51:48.795695591 +0200
++++ src/CMakeLists.txt	2012-03-30 06:52:25.829694273 +0200
+@@ -15,12 +15,8 @@
+ INCLUDE(Pod2Man)
+ 
+ ADD_DEFINITIONS(
+-	-O3
+-	-fstack-protector
+ 	-fpie
+ 	-std=gnu99
+-	-fno-strict-aliasing
+-	-D_FORTIFY_SOURCE=2
+ 	-D_REENTRANT
+ 	-Wall
+ 	-Wundef
+@@ -55,6 +51,7 @@
+ 	-Wfloat-equal
+ 	-Wunknown-pragmas
+ 	-Wunused-function
++    ${OPTFLAGS}
+ )
+ 
+ IF (CMAKE_BUILD_TYPE STREQUAL profile)
diff --git a/netsniff-ng.spec b/netsniff-ng.spec
index 891c2e6..6fcdce6 100644
--- a/netsniff-ng.spec
+++ b/netsniff-ng.spec
@@ -18,6 +18,7 @@ Release:        0
 Summary:        High Performance Network Sniffer for Packet Inspection
 Source:         http://www.netsniff-ng.org/pub/netsniff-ng/netsniff-ng-%{version}.tar.gz
 Patch1:         netsniff-ng-cmake_pod2man_without_stderr.patch
+Patch2:         netsniff-ng-optflags.patch
 URL:            http://code.google.com/p/netsniff-ng/
 Group:          Productivity/Networking/Diagnostic
 License:        GPL-2.0+
@@ -31,8 +32,10 @@ BuildRequires:  liburcu-devel
 %else
 %define with_nf 0
 %endif
-BuildRequires:  flex bison
-BuildRequires:  cmake gcc make glibc-devel
+BuildRequires:  flex
+BuildRequires:  bison >= 2.5
+BuildRequires:  cmake >= 2.8
+BuildRequires:  gcc make glibc-devel
 BuildRequires:  autoconf automake libtool
 
 %description
@@ -50,12 +53,14 @@ firewalls.
 %if 0%{?suse_version} < 1140
 %patch1
 %endif
+%patch2
 
 %build
 %__install -d build
 pushd build
 cmake \
     -DCMAKE_INSTALL_PREFIX="%{_usr}" \
+    -DOPTFLAGS="%{optflags}" \
     ../src/
 %__make %{?_smp_mflags} VERBOSE=1
 popd