diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 05f938fd8..ef8714908 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -15,6 +15,7 @@ For a list of important changes that require manual actions, please look at rele
 
 Bug fixes::
 
+  * core, relay: fix include directory of libzstd
   * irc: fix crash in split of IRC message containing a newline if the server is not given
 
 [[v4.2.2]]
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 53e3daa0d..07894b84e 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -92,7 +92,7 @@ include_directories(${GNUTLS_INCLUDE_PATH})
 include_directories(${CURL_INCLUDE_DIRS})
 
 if(ENABLE_ZSTD)
-  include_directories(${ZSTD_INCLUDE_DIRS})
+  include_directories(${LIBZSTD_INCLUDE_DIRS})
 endif()
 
 include_directories("${CMAKE_BINARY_DIR}")
diff --git a/src/plugins/relay/CMakeLists.txt b/src/plugins/relay/CMakeLists.txt
index 890db888c..50759034f 100644
--- a/src/plugins/relay/CMakeLists.txt
+++ b/src/plugins/relay/CMakeLists.txt
@@ -51,7 +51,7 @@ list(APPEND LINK_LIBS ${GCRYPT_LDFLAGS})
 list(APPEND LINK_LIBS ${ZLIB_LIBRARY})
 
 if(ENABLE_ZSTD)
-  include_directories(${ZSTD_INCLUDE_DIRS})
+  include_directories(${LIBZSTD_INCLUDE_DIRS})
   list(APPEND LINK_LIBS ${LIBZSTD_LDFLAGS})
 endif()