diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 164660a..7c99453 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,6 @@
+include_directories(${FLTK_INCLUDE_DIR})
+include_directories(${GETTEXT_INCLUDE_DIR})
+
 include_directories(${CMAKE_SOURCE_DIR}/common)
 
 add_library(test_util STATIC util.cxx)