1 files changed, 8 insertions, 0 deletions
diff --git a/tk.h b/tk.h
index d618134..785808d 100644
--- a/tk.h
+++ b/tk.h
@@ -9,6 +9,14 @@
 // but which don't need to be repeated in every source file
 ////
 
+// AVR GCC has no boolean type by default
+// (this isn't native bool, but it's mostly okay)
+#define bool uint8_t
+#define false 0
+#define true 1
+#define FALSE 0
+#define TRUE 1
+
 // create a way to include files defined at the command line,
 // like with "gcc -DCONFIGFILE=foo.h"
 #define incfile2(s) #s