Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -17,11 +17,11 @@
 AC_PROG_INSTALL
 AC_PROG_EGREP
 
 CPP="$OBJCPP"
 CPPFLAGS="$CPPFLAGS $OBJCPPFLAGS"
-OBJCFLAGS="$OBJCFLAGS -Wall -fexceptions -fobjc-exceptions"
+OBJCFLAGS="$OBJCFLAGS -Wall -fexceptions -fobjc-exceptions -funwind-tables"
 OBJCFLAGS="$OBJCFLAGS -fconstant-string-class=OFConstantString"
 
 AX_CHECK_COMPILER_FLAGS(-std=gnu99, [OBJCFLAGS="$OBJCFLAGS -std=gnu99"])
 case $OBJC in
 	*clang*)