diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	(revision b0a749c8e7a8294b68581ce4feac0e55045eb00b)
+++ b/CMakeLists.txt	(date 1669850632899)
@@ -1071,8 +1071,8 @@
     "${LWS_ABSOLUTE_INSTALL_CMAKE_DIR}"
     "${LWS_ABSOLUTE_INSTALL_INCLUDE_DIR}") # Calculate the relative directory from the cmake dir.
 
-if (DEFINED REL_INCLUDE_DIR)
-    set(LWS__INCLUDE_DIRS "\${LWS_CMAKE_DIR}/${REL_INCLUDE_DIR}")
+if (1)
+	set(LWS__INCLUDE_DIRS "\${CMAKE_CURRENT_LIST_DIR}/../include")
 endif()
 if (DEFINED OPENSSL_INCLUDE_DIRS)
 	set(LWS__INCLUDE_DIRS "${LWS__INCLUDE_DIRS};${OPENSSL_INCLUDE_DIRS}")
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
--- a/lib/CMakeLists.txt	(revision b0a749c8e7a8294b68581ce4feac0e55045eb00b)
+++ b/lib/CMakeLists.txt	(date 1669850782017)
@@ -174,7 +174,7 @@
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/../include>
 	)
-	target_include_directories(websockets PRIVATE ${LWS_LIB_BUILD_INC_PATHS})
+	target_include_directories(websockets PRIVATE $<BUILD_INTERFACE:${LWS_LIB_BUILD_INC_PATHS}> PUBLIC $<INSTALL_INTERFACE:include>)
 	target_compile_definitions(websockets PRIVATE LWS_BUILDING_STATIC)
 	target_include_directories(websockets PUBLIC ${LWS_PUBLIC_INCLUDES})
 	set(LWS_PUBLIC_INCLUDES ${LWS_PUBLIC_INCLUDES} PARENT_SCOPE)
@@ -202,7 +202,7 @@
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/../include>
 	)
-	target_include_directories(websockets_shared PRIVATE ${LWS_LIB_BUILD_INC_PATHS})
+	target_include_directories(websockets_shared PRIVATE $<BUILD_INTERFACE:${LWS_LIB_BUILD_INC_PATHS}> PUBLIC $<INSTALL_INTERFACE:include>)
 	target_compile_definitions(websockets_shared PRIVATE LWS_BUILDING_SHARED)
 	target_include_directories(websockets_shared PUBLIC ${LWS_PUBLIC_INCLUDES})
 	set(LWS_PUBLIC_INCLUDES ${LWS_PUBLIC_INCLUDES} PARENT_SCOPE)