diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8455bb8bc..2b398e0ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -136,11 +136,11 @@ IF ( CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR )
 ENDIF ( CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR )
 
 # Cache these to allow the user to override them manually.
-SET( ASSIMP_LIB_INSTALL_DIR "lib" CACHE PATH
+SET( ASSIMP_LIB_INSTALL_DIR "lib" CACHE STRING
   "Path the built library files are installed to." )
-SET( ASSIMP_INCLUDE_INSTALL_DIR "include" CACHE PATH
+SET( ASSIMP_INCLUDE_INSTALL_DIR "include" CACHE STRING
   "Path the header files are installed to." )
-SET( ASSIMP_BIN_INSTALL_DIR "bin" CACHE PATH
+SET( ASSIMP_BIN_INSTALL_DIR "bin" CACHE STRING
   "Path the tool executables are installed to." )
 
 IF (CMAKE_BUILD_TYPE STREQUAL "Debug")
diff --git a/assimp.pc.in b/assimp.pc.in
index ecb7074d3..5b2139e6d 100644
--- a/assimp.pc.in
+++ b/assimp.pc.in
@@ -1,5 +1,5 @@
 prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@/@ASSIMP_BIN_INSTALL_DIR@
+exec_prefix=@CMAKE_INSTALL_PREFIX@/
 libdir=@CMAKE_INSTALL_PREFIX@/@ASSIMP_LIB_INSTALL_DIR@
 includedir=@CMAKE_INSTALL_PREFIX@/@ASSIMP_INCLUDE_INSTALL_DIR@/assimp