Index: head/share/mk/bsd.sys.mk
===================================================================
--- head/share/mk/bsd.sys.mk
+++ head/share/mk/bsd.sys.mk
@@ -94,6 +94,9 @@
 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
 CWARNFLAGS.clang+=	-Wno-address-of-packed-member
 .endif
+.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100
+CWARNFLAGS.gcc+=	-Wno-address-of-packed-member
+.endif
 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
     ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
 CWARNFLAGS.clang+=	-Wno-atomic-alignment