diff --git a/contrib/librdkafka-cmake/CMakeLists.txt b/contrib/librdkafka-cmake/CMakeLists.txt
index 96701c4f8a7..34f2315c33c 100644
--- a/contrib/librdkafka-cmake/CMakeLists.txt
+++ b/contrib/librdkafka-cmake/CMakeLists.txt
@@ -56,4 +56,5 @@ ${RDKAFKA_SOURCE_DIR}/rdgz.c
 
 add_library(rdkafka STATIC ${SRCS})
 target_include_directories(rdkafka PRIVATE include)
+target_include_directories(rdkafka PUBLIC ${RDKAFKA_SOURCE_DIR})
 target_link_libraries(rdkafka PUBLIC ${ZLIB_LIBRARIES} ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})