fix build on FreeBSD #3117

Job	Run time
macOS 12 native [GOAL install] [GUI] [no depends]	15m 45s
Lint	52s
ARM [GOAL install] [buster]	12m 2s
Win32	13m 46s
Win64	31m 33s
i386 Linux [GOAL install] [focal]	11m 59s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	16m 35s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	15m 26s
x86_64 Linux [ASan] [LSan] [UBSan] [integer] [jammy] [no depends]	18m 50s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	28m 59s
	2h 45m 47s

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