diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7edaf518b8..a0ab0b184f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -190,7 +190,7 @@ else()
   set(CURL_OS "\"${CMAKE_SYSTEM_NAME}\"")
 endif()
 
-include_directories("${PROJECT_SOURCE_DIR}/include")
+set_property(DIRECTORY APPEND PROPERTY INCLUDE_DIRECTORIES "${PROJECT_SOURCE_DIR}/include")
 
 if(NOT DEFINED CMAKE_UNITY_BUILD_BATCH_SIZE)
   set(CMAKE_UNITY_BUILD_BATCH_SIZE 0)
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 8369138833..3e87198960 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -36,7 +36,8 @@ list(APPEND HHEADERS "${CMAKE_CURRENT_BINARY_DIR}/curl_config.h")
 
 # The rest of the build
 
-include_directories("${PROJECT_BINARY_DIR}/lib")  # for "curl_config.h"
+set_property(DIRECTORY APPEND PROPERTY INCLUDE_DIRECTORIES "${PROJECT_BINARY_DIR}/lib")  # for "curl_config.h"
+
 if(USE_ARES)
   include_directories(SYSTEM ${CARES_INCLUDE_DIRS})
 endif()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a0b700bce4..3bf66091e3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -77,6 +77,13 @@ if(BUILD_STATIC_CURL)
   set(CURLX_CFILES ${CURLTOOL_LIBCURL_CFILES})
 endif()
 
+set_property(DIRECTORY APPEND PROPERTY INCLUDE_DIRECTORIES
+  "${PROJECT_BINARY_DIR}/lib"  # for "curl_config.h"
+  "${PROJECT_SOURCE_DIR}/lib"  # for "curl_setup.h"
+  # This is needed as tool_hugehelp.c is generated in the binary dir
+  "${PROJECT_SOURCE_DIR}/src"  # for "tool_hugehelp.h"
+)
+
 add_executable(
   ${EXE_NAME}
   ${CURL_CFILES} ${_curl_cfiles_gen} ${CURLX_CFILES} ${CURL_HFILES} ${_curl_hfiles_gen}
@@ -109,13 +116,6 @@ source_group("curlX source files" FILES ${CURLX_CFILES})
 source_group("curl source files" FILES ${CURL_CFILES} ${_curl_cfiles_gen})
 source_group("curl header files" FILES ${CURL_HFILES} ${_curl_hfiles_gen})
 
-include_directories(
-  "${PROJECT_BINARY_DIR}/lib"  # for "curl_config.h"
-  "${PROJECT_SOURCE_DIR}/lib"  # for "curl_setup.h"
-  # This is needed as tool_hugehelp.c is generated in the binary dir
-  "${PROJECT_SOURCE_DIR}/src"  # for "tool_hugehelp.h"
-)
-
 # Build curl executable
 target_link_libraries(${EXE_NAME} ${LIB_SELECTED_FOR_EXE} ${CURL_LIBS})