diff --git a/src/bitbang.h b/src/bitbang.h
index 93a401e7..6b48eac2 100644
--- a/src/bitbang.h
+++ b/src/bitbang.h
@@ -25,33 +25,29 @@
 extern "C" {
 #endif
 
-int bitbang_setpin(int fd, int pin, int value);
-int bitbang_getpin(int fd, int pin);
-int bitbang_highpulsepin(int fd, int pin);
-void bitbang_delay(unsigned int us);
+  int bitbang_setpin(int fd, int pin, int value);
+  int bitbang_getpin(int fd, int pin);
+  int bitbang_highpulsepin(int fd, int pin);
+  void bitbang_delay(unsigned int us);
 
-int bitbang_check_prerequisites(const PROGRAMMER *pgm);
+  int bitbang_check_prerequisites(const PROGRAMMER *pgm);
 
-int  bitbang_rdy_led        (const PROGRAMMER *pgm, int value);
-int  bitbang_err_led        (const PROGRAMMER *pgm, int value);
-int  bitbang_pgm_led        (const PROGRAMMER *pgm, int value);
-int  bitbang_vfy_led        (const PROGRAMMER *pgm, int value);
-int  bitbang_cmd            (const PROGRAMMER *pgm, const unsigned char *cmd,
-                                unsigned char *res);
-int  bitbang_cmd_tpi        (const PROGRAMMER *pgm, const unsigned char *cmd,
-                                int cmd_len, unsigned char *res, int res_len);
-int  bitbang_spi            (const PROGRAMMER *pgm, const unsigned char *cmd,
-                                unsigned char *res, int count);
-int  bitbang_chip_erase     (const PROGRAMMER *pgm, const AVRPART *p);
-int  bitbang_program_enable (const PROGRAMMER *pgm, const AVRPART *p);
-void bitbang_powerup        (const PROGRAMMER *pgm);
-void bitbang_powerdown      (const PROGRAMMER *pgm);
-int  bitbang_initialize     (const PROGRAMMER *pgm, const AVRPART *p);
-void bitbang_disable        (const PROGRAMMER *pgm);
-void bitbang_enable         (PROGRAMMER *pgm, const AVRPART *p);
+  int bitbang_rdy_led(const PROGRAMMER *pgm, int value);
+  int bitbang_err_led(const PROGRAMMER *pgm, int value);
+  int bitbang_pgm_led(const PROGRAMMER *pgm, int value);
+  int bitbang_vfy_led(const PROGRAMMER *pgm, int value);
+  int bitbang_cmd(const PROGRAMMER *pgm, const unsigned char *cmd, unsigned char *res);
+  int bitbang_cmd_tpi(const PROGRAMMER *pgm, const unsigned char *cmd, int cmd_len, unsigned char *res, int res_len);
+  int bitbang_spi(const PROGRAMMER *pgm, const unsigned char *cmd, unsigned char *res, int count);
+  int bitbang_chip_erase(const PROGRAMMER *pgm, const AVRPART *p);
+  int bitbang_program_enable(const PROGRAMMER *pgm, const AVRPART *p);
+  void bitbang_powerup(const PROGRAMMER *pgm);
+  void bitbang_powerdown(const PROGRAMMER *pgm);
+  int bitbang_initialize(const PROGRAMMER *pgm, const AVRPART *p);
+  void bitbang_disable(const PROGRAMMER *pgm);
+  void bitbang_enable(PROGRAMMER *pgm, const AVRPART *p);
 
 #ifdef __cplusplus
 }
 #endif
-
 #endif