diff --git a/install.sh b/install.sh
index d5e7894..7b862a9 100644
--- a/install.sh
+++ b/install.sh
@@ -2,7 +2,7 @@
 
 set -xe
 
-mkdir /usr/include/xolatile
+mkdir -p /usr/include/xolatile
 
 cp xtandard.h /usr/include/xolatile/xtandard.h
 cp xtandard.c /usr/include/xolatile/xtandard.c
diff --git a/xtandard.h b/xtandard.h
index c68a11b..0916dfb 100644
--- a/xtandard.h
+++ b/xtandard.h
@@ -37,6 +37,7 @@ enum {
 
 enum {
 	SIGNAL_NONE,
+	SIGNAL_ANY,
 	SIGNAL_A,           SIGNAL_B,           SIGNAL_C,           SIGNAL_D,           SIGNAL_E,           SIGNAL_F,           SIGNAL_G,           SIGNAL_H,
 	SIGNAL_I,           SIGNAL_J,           SIGNAL_K,           SIGNAL_L,           SIGNAL_M,           SIGNAL_N,           SIGNAL_O,           SIGNAL_P,
 	SIGNAL_Q,           SIGNAL_R,           SIGNAL_S,           SIGNAL_T,           SIGNAL_U,           SIGNAL_V,           SIGNAL_W,           SIGNAL_X,