diff --git a/host/hackrf-tools/src/CMakeLists.txt b/host/hackrf-tools/src/CMakeLists.txt
index ee2dbb94..b2978670 100644
--- a/host/hackrf-tools/src/CMakeLists.txt
+++ b/host/hackrf-tools/src/CMakeLists.txt
@@ -24,7 +24,7 @@
 set(INSTALL_DEFAULT_BINDIR "bin" CACHE STRING "Appended to CMAKE_INSTALL_PREFIX")
 
 find_package(FFTW REQUIRED)
-include_directories(${FFTW_INCLUDE_DIRS})
+include_directories(${FFTW_INCLUDES})
 link_directories(${FFTW_LIBRARY_DIRS})
 
 SET(TOOLS