diff --git a/avogadro-1.1.1-pkgconfig_eigen.patch b/avogadro-1.1.1-pkgconfig_eigen.patch
deleted file mode 100644
index a5b2af4..0000000
--- a/avogadro-1.1.1-pkgconfig_eigen.patch
+++ /dev/null
@@ -1,8 +0,0 @@
-diff -up avogadro-1.1.1/avogadro.pc.in.eigen avogadro-1.1.1/avogadro.pc.in
---- avogadro-1.1.1/avogadro.pc.in.eigen	2013-12-06 09:50:04.000000000 -0600
-+++ avogadro-1.1.1/avogadro.pc.in	2014-01-25 00:37:45.732007852 -0600
-@@ -9,3 +9,4 @@ Description: Avogadro libraries
- Version: @Avogadro_VERSION_FULL@
- Libs: -L${libdir} -lavogadro
- Cflags: -I${pkgincludedir}
-+Requires.private: eigen2
diff --git a/avogadro-1.2.0-pkgconfig_eigen.patch b/avogadro-1.2.0-pkgconfig_eigen.patch
new file mode 100644
index 0000000..a5b2af4
--- /dev/null
+++ b/avogadro-1.2.0-pkgconfig_eigen.patch
@@ -0,0 +1,8 @@
+diff -up avogadro-1.1.1/avogadro.pc.in.eigen avogadro-1.1.1/avogadro.pc.in
+--- avogadro-1.1.1/avogadro.pc.in.eigen	2013-12-06 09:50:04.000000000 -0600
++++ avogadro-1.1.1/avogadro.pc.in	2014-01-25 00:37:45.732007852 -0600
+@@ -9,3 +9,4 @@ Description: Avogadro libraries
+ Version: @Avogadro_VERSION_FULL@
+ Libs: -L${libdir} -lavogadro
+ Cflags: -I${pkgincludedir}
++Requires.private: eigen2
diff --git a/avogadro.spec b/avogadro.spec
index 5ee068d..c890ea0 100644
--- a/avogadro.spec
+++ b/avogadro.spec
@@ -16,7 +16,7 @@ Patch0:         %{name}-1.1.1-mkspecs-dir.patch
 # Remove -Wl,-s from the compiler flags, fixes -debuginfo (#700080)
 Patch1:         %{name}-1.1.1-no-strip.patch
 # avogadro.pc missing eigen dependency
-Patch2:         %{name}-1.1.1-pkgconfig_eigen.patch
+Patch2:         %{name}-1.2.0-pkgconfig_eigen.patch
 
 ## upstreamable
 # fix build with cmake-3.2+
@@ -40,7 +40,7 @@ BuildRequires:  desktop-file-utils
 BuildRequires:  docbook-utils
 BuildRequires:  numpy, gcc-c++
 BuildRequires:  python2-devel
-BuildRequires:  pkgconfig(eigen3)
+BuildRequires:  pkgconfig(eigen2)
 BuildRequires:  pkgconfig(glew) >= 1.5.0
 BuildRequires:  pkgconfig(openbabel-2.0) >= 2.2.2
 BuildRequires:  pkgconfig(QtGui) pkgconfig(QtNetwork) pkgconfig(QtOpenGL)
@@ -90,6 +90,7 @@ Language packs for Avogadro.
 %patch12 -p1 -b .Q_MOC_RUN
 %patch13 -p1 -b .python_openbabel
 %patch14 -p1 -b .qt
+%patch15 -p1 -b .libmsymfloat
 
 ## Remove spurious executable permissions
 for i in `find . -perm /755 -type f \( -name "*.cpp" -o -name "*.h" -o -name "*.c" \)`; do
@@ -99,7 +100,7 @@ done
 %build
 mkdir build && pushd build
 export LDFLAGS="%{__global_ldflags} -lm -Wl,--as-needed"
-export CXXFLAGS="%{optflags} -I$PWD/libavogadro/src -I%{_includedir}/eigen3"
+export CXXFLAGS="%{optflags} -I$PWD/libavogadro/src"
 %cmake -DCMAKE_BUILD_TYPE:STRING=Release \
   -Wno-dev \
   %{?ENABLE_TESTS} \
@@ -165,7 +166,7 @@ xvfb-run -a dbus-launch --exit-with-session make test ARGS="--output-on-failure"
 %{_qt4_prefix}/mkspecs/features/avogadro.prf
 
 %files libs -f libavogadro.lang
-%doc AUTHORS README.md
+%doc AUTHORS README
 %license COPYING
 %{python2_sitearch}/Avogadro.so
 %{_datadir}/libavogadro/