--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -603,7 +603,7 @@
 	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/ode/src>
 	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/ode/src/joints>
 	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/ou/include>
-	$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>
+	$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
 if(ODE_16BIT_INDICES)
@@ -759,8 +759,8 @@
 string(REGEX REPLACE "/$" "" PACKAGE_RELATIVE_PATH "${PACKAGE_RELATIVE_PATH}")
 set(prefix "\${pcfiledir}/${PACKAGE_RELATIVE_PATH}")
 set(exec_prefix "\${prefix}")
-set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+set(libdir "\${exec_prefix}/lib")
+set(includedir "\${prefix}/include")
 configure_file(ode.pc.in ode.pc @ONLY)
 set(prefix "\$(cd \"\$(dirname \"\$0\")\"; pwd -P)/..")
 configure_file(ode-config.in ode-config @ONLY)