diff --git a/sys/boot/i386/boot2/Makefile b/sys/boot/i386/boot2/Makefile
index ead9ad1..af5e021 100644
--- a/sys/boot/i386/boot2/Makefile
+++ b/sys/boot/i386/boot2/Makefile
@@ -45,6 +45,9 @@ CFLAGS.gcc+=	-Os \
 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} <= 40201
 CFLAGS.gcc+=   -mno-align-long-strings
 .endif
+.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40600
+CFLAGS.gcc+=	-fno-asynchronous-unwind-tables
+.endif
 
 CFLAGS.clang+=	-Oz ${CLANG_OPT_SMALL}