diff --git a/modules/math_libs.cmake b/modules/math_libs.cmake
index 6cbf582..5d3c0f0 100644
--- a/modules/math_libs.cmake
+++ b/modules/math_libs.cmake
@@ -270,6 +270,8 @@ macro(find_math_libs _service)
     unset(l)
 endmacro()
 
+include(FindPackageHandleStandardArgs)
+
 macro(cache_math_result _service MATH_TYPE)
     string(TOUPPER ${_service} _SERVICE)
     set(${_SERVICE}_FIND_QUIETLY TRUE)