diff --git a/lib/libgcc_eh/Makefile.inc b/lib/libgcc_eh/Makefile.inc
--- a/lib/libgcc_eh/Makefile.inc
+++ b/lib/libgcc_eh/Makefile.inc
@@ -17,6 +17,9 @@
 SRCS_EXC+=	libunwind.cpp
 
 SRCS+=		${SRCS_EXC}
+.if ${MACHINE} == "amd64" || ${MACHINE} == "i386" || ${MACHINE} == "powerpc"
+CFLAGS.UnwindLevel1-gcc-ext.c+=	-D_LIBUNWIND_SUPPORT_FRAME_APIS
+.endif
 .for file in ${SRCS_EXC:M*.c}
 CFLAGS.${file}+=	-fno-exceptions -funwind-tables
 .if ${MK_ASAN} != "no"