diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2cabf8d52..7f02431ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -231,7 +231,7 @@ if(NOT Linguist_FOUND)
   message(WARNING " Qt4 Linguist not found, please install it if you want Avogadro translations")
 endif()
 
-find_package(Eigen3 REQUIRED) # find and setup Eigen3 if available
+find_package(Eigen3 REQUIRED) # find and setup Eigen3
 
 find_package(ZLIB REQUIRED)
 find_package(OpenBabel2 REQUIRED) # find and setup OpenBabel
@@ -466,7 +466,6 @@ install(FILES
 
 # Install the find modules we require to be present
 install(FILES
-  "${CMAKE_MODULE_PATH}/FindEigen2.cmake"
   "${CMAKE_MODULE_PATH}/FindEigen3.cmake"
   "${CMAKE_MODULE_PATH}/FindGLEW.cmake"
   DESTINATION "${Avogadro_PLUGIN_INSTALL_DIR}/cmake")
diff --git a/avogadro/src/CMakeLists.txt b/avogadro/src/CMakeLists.txt
index da5c0703e..55b7517f0 100644
--- a/avogadro/src/CMakeLists.txt
+++ b/avogadro/src/CMakeLists.txt
@@ -22,15 +22,9 @@ include_directories(
   ${CMAKE_CURRENT_BINARY_DIR}
 )
 
-if(EIGEN3_FOUND)
-	include_directories(
-		${EIGEN3_INCLUDE_DIR}
-	)
-elseif(EIGEN2_FOUND)
-	include_directories(
-		${EIGEN2_INCLUDE_DIR}
-	)
-endif(EIGEN3_FOUND)
+include_directories(
+    ${EIGEN3_INCLUDE_DIR}
+)
 
 if(GLEW_FOUND)
   include_directories(${GLEW_INCLUDE_DIR})
diff --git a/libavogadro/src/CMakeLists.txt b/libavogadro/src/CMakeLists.txt
index a1cc46d24..cff3e69aa 100644
--- a/libavogadro/src/CMakeLists.txt
+++ b/libavogadro/src/CMakeLists.txt
@@ -14,15 +14,9 @@ include_directories(
   ${OPENBABEL2_INCLUDE_DIR}
 )
 
-if(EIGEN3_FOUND)
-	include_directories(
-		${EIGEN3_INCLUDE_DIR}
-	)
-elseif(EIGEN2_FOUND)
-	include_directories(
-		${EIGEN2_INCLUDE_DIR}
-	)
-endif(EIGEN3_FOUND)
+include_directories(
+    ${EIGEN3_INCLUDE_DIR}
+)
 
 # I think this is necessary now in order to tell the linker where openbabel is
 link_directories(${OPENBABEL2_LIBRARY_DIRS})
diff --git a/libavogadro/src/extensions/surfaces/openqube/CMakeLists.txt b/libavogadro/src/extensions/surfaces/openqube/CMakeLists.txt
index d52f2a688..8d29a4140 100644
--- a/libavogadro/src/extensions/surfaces/openqube/CMakeLists.txt
+++ b/libavogadro/src/extensions/surfaces/openqube/CMakeLists.txt
@@ -1,13 +1,6 @@
 find_package(Qt4 4.6 REQUIRED)
-find_package(Eigen3)
-if(NOT EIGEN3_FOUND)
-  message(STATUS "Cannot find Eigen3, trying Eigen2")
-  find_package(Eigen2 REQUIRED)
-else()
-  set (EIGEN2_SUPPORT_STAGE10_FULL_EIGEN2_API TRUE)
-endif()
-
-include_directories(${QT_INCLUDE_DIR} ${EIGEN2_INCLUDE_DIR})
+
+include_directories(${QT_INCLUDE_DIR} ${EIGEN3_INCLUDE_DIR})
 
 # Headers for our public API
 set(openqube_HDRS
diff --git a/libavogadro/tests/CMakeLists.txt b/libavogadro/tests/CMakeLists.txt
index 4ace55970..4af7cc2c2 100644
--- a/libavogadro/tests/CMakeLists.txt
+++ b/libavogadro/tests/CMakeLists.txt
@@ -13,7 +13,7 @@ set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES
 include_directories(
   ${CMAKE_SOURCE_DIR}
   ${CMAKE_CURRENT_BINARY_DIR}
-  ${EIGEN2_INCLUDE_DIR}
+  ${EIGEN3_INCLUDE_DIR}
   ${OPENBABEL2_INCLUDE_DIR}
   ${BOOST_PYTHON_INCLUDES}
   ${PYTHON_INCLUDE_PATH}