diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 00391122bb..5a653a7d91 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -231,6 +231,7 @@ endif()
 if( EXIV2_ENABLE_PNG )
     target_link_libraries( exiv2lib PRIVATE ZLIB::ZLIB)
     target_include_directories(exiv2lib_int PRIVATE ${ZLIB_INCLUDE_DIR})
+    target_include_directories(exiv2lib PRIVATE ${ZLIB_INCLUDE_DIR})
     list(APPEND requires_private_list "zlib")
 endif()