@@ -3,8 +3,10 @@
 --- this file gathers information on the environment it's
 --- being compiled in, setting macros that other headers
 --- need. it will be emitted as <k/def.h>.
 --- vim: ft=c
+#ifndef KIdef
+#define KIdef
 
 [ifdef atom_target_bits]
 	[define target: [atom_target_arch].[atom_target_os].[atom_target_bits]]
 	#define KVbits [atom_target_bits]
@@ -29,4 +31,6 @@
 #else
 #   define Kerror(msg) Kpragma(message #msg)
 #endif
 #define Knoimpl(fn) Kerror(no implementation of fn for platform [target])
+
+#endif