diff --git a/codec2-el6_gnu11.patch b/codec2-el6_gnu11.patch
deleted file mode 100644
index 2b133e7..0000000
--- a/codec2-el6_gnu11.patch
+++ /dev/null
@@ -1,31 +0,0 @@
-Index: codec2-dev/CMakeLists.txt
-===================================================================
---- codec2-dev/CMakeLists.txt	(revision 3026)
-+++ codec2-dev/CMakeLists.txt	(working copy)
-@@ -52,18 +52,21 @@
- endif()
- 
- # Set default C++ flags.
--set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
--set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -g -O3 -std=gnu11")
-+include(CheckCCompilerFlag)
-+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -g -O3")
-+CHECK_C_COMPILER_FLAG("-std=gnu11" COMPILER_SUPPORTS_GNU11)
-+if(COMPILER_SUPPORTS_GNU11)
-+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11")
-+else()
-+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
-+endif()
- # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
- 
- set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS}")
--set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS}")
- set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}")
--set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS}")
- 
- # -fPIC is implied on MinGW...
- if(NOT WIN32)
--    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
-     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
- endif()
- 
diff --git a/codec2.spec b/codec2.spec
index 541eb67..21c0d57 100644
--- a/codec2.spec
+++ b/codec2.spec
@@ -7,8 +7,6 @@ License:        LGPLv2
 URL:            http://rowetel.com/codec2.html
 Source0:        http://files.freedv.org/%{name}/%{name}-%{version}.tar.xz
 
-Patch0:         codec2-el6_gnu11.patch
-
 BuildRequires:  cmake%{?rhel:3}
 BuildRequires:  speex-devel
 %if 0%{?fedora}
@@ -41,8 +39,7 @@ Example code for Codec 2
 
 
 %prep
-%setup -q
-%patch0 -p1
+%autosetup
 
 
 %build