diff --git a/src/BulletCollision/CMakeLists.txt b/src/BulletCollision/CMakeLists.txt
index 959ab257f..4b4304f43 100644
--- a/src/BulletCollision/CMakeLists.txt
+++ b/src/BulletCollision/CMakeLists.txt
@@ -215,10 +215,10 @@ IF (BUILD_SHARED_LIBS)
 ENDIF (BUILD_SHARED_LIBS)
 
 #INSTALL of other files requires CMake 2.6
-IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 	INSTALL(TARGETS BulletCollision DESTINATION lib)
         INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include FILES_MATCHING PATTERN "*.h")
-ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 
 IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
 	SET_TARGET_PROPERTIES(BulletCollision PROPERTIES FRAMEWORK true)
diff --git a/src/BulletDynamics/CMakeLists.txt b/src/BulletDynamics/CMakeLists.txt
index 108e17553..ecfcbfef9 100644
--- a/src/BulletDynamics/CMakeLists.txt
+++ b/src/BulletDynamics/CMakeLists.txt
@@ -75,10 +75,10 @@ IF (BUILD_SHARED_LIBS)
 	TARGET_LINK_LIBRARIES(BulletDynamics BulletCollision LinearMath)
 ENDIF (BUILD_SHARED_LIBS)
 
-IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 	INSTALL(TARGETS BulletDynamics DESTINATION lib)
 	INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include FILES_MATCHING PATTERN "*.h")
-ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 
 IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
 	SET_TARGET_PROPERTIES(BulletDynamics PROPERTIES FRAMEWORK true)
diff --git a/src/BulletSoftBody/CMakeLists.txt b/src/BulletSoftBody/CMakeLists.txt
index 0b5947a67..dbd87afea 100644
--- a/src/BulletSoftBody/CMakeLists.txt
+++ b/src/BulletSoftBody/CMakeLists.txt
@@ -32,10 +32,10 @@ IF (BUILD_SHARED_LIBS)
 	TARGET_LINK_LIBRARIES(BulletSoftBody BulletDynamics)
 ENDIF (BUILD_SHARED_LIBS)
 
-IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 	INSTALL(TARGETS BulletSoftBody DESTINATION lib)
-	INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include ${BulletSoftBody_HDRS})
-ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+        INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include FILES_MATCHING PATTERN "*.h")
+ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 
 IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
 	SET_TARGET_PROPERTIES(BulletSoftBody PROPERTIES FRAMEWORK true)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5689149f7..c6a72b9f3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,7 +5,7 @@ SUBDIRS( BulletMultiThreaded BulletSoftBody BulletCollision BulletDynamics Linea
 endif (CMAKE_SIZEOF_VOID_P MATCHES "8")
 
 #INSTALL of other files requires CMake 2.6
-IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
         INSTALL(FILES btBulletCollisionCommon.h btBulletDynamicsCommon.h Bullet-C-Api.h DESTINATION include)
-ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 
diff --git a/src/LinearMath/CMakeLists.txt b/src/LinearMath/CMakeLists.txt
index ad76dbbd4..f7008f22c 100644
--- a/src/LinearMath/CMakeLists.txt
+++ b/src/LinearMath/CMakeLists.txt
@@ -40,10 +40,10 @@ SET_TARGET_PROPERTIES(LinearMath PROPERTIES VERSION ${BULLET_VERSION})
 SET_TARGET_PROPERTIES(LinearMath PROPERTIES SOVERSION ${BULLET_VERSION})
 
 #FILES_MATCHING requires CMake 2.6
-IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 	INSTALL(TARGETS LinearMath DESTINATION lib)
 	INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include FILES_MATCHING PATTERN "*.h")
-ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.6)
+ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5)
 
 IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK)
 	SET_TARGET_PROPERTIES(LinearMath PROPERTIES FRAMEWORK true)