#elif defined(pic18f2220)
# include <pic18f2220.h>
+#elif defined(pic18f2550)
+# include <pic18f2550.h>
+
+#elif defined(pic18f4331)
+# include <pic18f4331.h>
+
+#elif defined(pic18f4455)
+# include <pic18f4455.h>
+
#elif defined(pic18f6520)
# include <pic18f6520.h>