diff -Nuar a/assimp.pc.in b/assimp.pc.in
--- a/assimp.pc.in	2020-01-12 14:56:40.000000000 +0300
+++ b/assimp.pc.in	2021-01-03 19:10:31.796879663 +0300
@@ -1,7 +1,7 @@
 prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@/
+exec_prefix=@CMAKE_INSTALL_PREFIX@
 libdir=@CMAKE_INSTALL_PREFIX@/@ASSIMP_LIB_INSTALL_DIR@
-includedir=@CMAKE_INSTALL_PREFIX@/../include/@ASSIMP_INCLUDE_INSTALL_DIR@
+includedir=@CMAKE_INSTALL_PREFIX@/@ASSIMP_INCLUDE_INSTALL_DIR@/assimp
 
 Name: @CMAKE_PROJECT_NAME@
 Description: Import various well-known 3D model formats in an uniform manner.