diff --git a/util/Findpigpio.cmake b/util/Findpigpio.cmake
index 6c94ee0..eebfbfe 100644
--- a/util/Findpigpio.cmake
+++ b/util/Findpigpio.cmake
@@ -25,6 +25,7 @@ set(pigpio_INCLUDES     ${pigpio_INCLUDE_DIR})
 
 # Handle REQUIRED, QUIET, and version arguments 
 # and set the <packagename>_FOUND variable.
+include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(pigpio 
     DEFAULT_MSG 
     pigpio_INCLUDE_DIR pigpio_LIBRARY pigpiod_if_LIBRARY pigpiod_if2_LIBRARY)