diff --git a/libc/include/math.h b/libc/include/math.h
index 7ca377e81..4dbb92986 100644
--- a/libc/include/math.h
+++ b/libc/include/math.h
@@ -2,6 +2,12 @@
 
 #include <sys/cdefs.h>
 
+#define FP_INFINITE		1
+#define FP_NAN			2
+#define FP_NORMAL		3
+#define FP_SUBNORMAL	4
+#define FP_ZERO			5
+
 __BEGIN_DECLS
 
 extern int signgam;