--- CMakeLists.txt.orig	2019-10-20 14:17:43 UTC
+++ CMakeLists.txt
@@ -52,7 +52,7 @@ if (LIBPGMATH_STANDALONE_BUILD)
 endif()
 
 set(LIBPGMATH_SYSTEM_NAME "${CMAKE_SYSTEM_NAME}")
-if ("${LIBPGMATH_SYSTEM_NAME}" STREQUAL "OpenBSD")
+if ("${LIBPGMATH_SYSTEM_NAME}" STREQUAL "OpenBSD" OR "${LIBPGMATH_SYSTEM_NAME}" STREQUAL "FreeBSD")
   set(LIBPGMATH_SYSTEM_NAME "Linux")
 endif ()