diff --git a/ChangeLog b/ChangeLog
index 710287e3..75f69b6a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
 	* avrftdi_private.h: Add libusb-1.0 include to fix include order in windows.
 	* NEWS: Add notice avrftdi supporting TPI
 	* avr.c: Fix avr_tpi_poll_nvmbsy() - poll read data instead of return code
+	* avrftdi_private.h, avrftdi.c: move logging #defines to from avrftdi.c to
+	avrftdi_private.h, so that they are available for avrftdi_tpi, too.
 
 2013-04-30  Hannes Weisbach <hannes_weisbach@gmx.net>
 
diff --git a/avrftdi.c b/avrftdi.c
index ff42f6a4..c931b3df 100644
--- a/avrftdi.c
+++ b/avrftdi.c
@@ -48,19 +48,6 @@
 #include <libftdi1/ftdi.h>
 
 enum { FTDI_SCK = 1, FTDI_MOSI, FTDI_MISO, FTDI_RESET };
-enum { ERR, WARN, INFO, DEBUG, TRACE };
-
-#define __log(lvl, fmt, ...)                                  \
-  do {                                                        \
-    avrftdi_log(lvl, __func__, __LINE__, fmt, ##__VA_ARGS__); \
-	} while(0)
-
-
-#define log_err(fmt, ...)   __log(ERR, fmt, ##__VA_ARGS__)
-#define log_warn(fmt, ...)  __log(WARN,  fmt, ##__VA_ARGS__)
-#define log_info(fmt, ...)  __log(INFO,  fmt, ##__VA_ARGS__)
-#define log_debug(fmt, ...) __log(DEBUG, fmt, ##__VA_ARGS__)
-#define log_trace(fmt, ...) __log(TRACE, fmt, ##__VA_ARGS__)
 
 #define FTDI_DEFAULT_MASK ( (1 << (FTDI_SCK - 1)) | (1 << (FTDI_MOSI - 1)) )
 
@@ -114,7 +101,7 @@ ftdi_pin_name(avrftdi_t* pdata, int pin)
  * This function is the backend of the log_*-macros, but it can be used
  * directly.
  */
-static void avrftdi_log(int level, const char * func, int line,
+void avrftdi_log(int level, const char * func, int line,
 		const char * fmt, ...) {
 	static int skip_prefix = 0;
 	const char *p = fmt;
diff --git a/avrftdi_private.h b/avrftdi_private.h
index 7ba39280..90c9f45b 100644
--- a/avrftdi_private.h
+++ b/avrftdi_private.h
@@ -11,6 +11,20 @@
 
 #include "pgm.h"
 
+enum { ERR, WARN, INFO, DEBUG, TRACE };
+
+#define __log(lvl, fmt, ...)                                  \
+  do {                                                        \
+    avrftdi_log(lvl, __func__, __LINE__, fmt, ##__VA_ARGS__); \
+	} while(0)
+
+
+#define log_err(fmt, ...)   __log(ERR, fmt, ##__VA_ARGS__)
+#define log_warn(fmt, ...)  __log(WARN,  fmt, ##__VA_ARGS__)
+#define log_info(fmt, ...)  __log(INFO,  fmt, ##__VA_ARGS__)
+#define log_debug(fmt, ...) __log(DEBUG, fmt, ##__VA_ARGS__)
+#define log_trace(fmt, ...) __log(TRACE, fmt, ##__VA_ARGS__)
+
 #define E(x, ftdi)                                                  \
 	do {                                                              \
 		if ((x))                                                        \