diff --git a/libraries/AP_HAL_AVR_SITL/Console.cpp b/libraries/AP_HAL_AVR_SITL/Console.cpp
index 569d27dbd2..b563681c8d 100644
--- a/libraries/AP_HAL_AVR_SITL/Console.cpp
+++ b/libraries/AP_HAL_AVR_SITL/Console.cpp
@@ -6,7 +6,7 @@
 #include <limits.h>
 #include <stdarg.h>
 #include "Console.h"
-#include "vprintf.h"
+#include "print_vprintf.h"
 
 using namespace AVR_SITL;
 
@@ -57,18 +57,28 @@ void SITLConsoleDriver::printf(const char *fmt, ...)
 {
         va_list ap;
         va_start(ap, fmt);
-        vprintf((AP_HAL::Print*)this, 0, fmt, ap);
+        vprintf(fmt, ap);
         va_end(ap);
 }
 
+void SITLConsoleDriver::vprintf(const char *fmt, va_list ap) 
+{
+        print_vprintf((AP_HAL::Print*)this, 0, fmt, ap);
+}
+
 void SITLConsoleDriver::_printf_P(const prog_char *fmt, ...) 
 {
         va_list ap;
         va_start(ap, fmt);
-        vprintf((AP_HAL::Print*)this, 1, fmt, ap);
+        vprintf_P(fmt, ap);
         va_end(ap);
 }
 
+void SITLConsoleDriver::vprintf_P(const prog_char *fmt, va_list ap) 
+{
+        print_vprintf((AP_HAL::Print*)this, 1, fmt, ap);
+}
+
 // Stream method implementations /////////////////////////////////////////
 int16_t SITLConsoleDriver::available(void) 
 {
diff --git a/libraries/AP_HAL_AVR_SITL/Console.h b/libraries/AP_HAL_AVR_SITL/Console.h
index f4669a6218..024db60078 100644
--- a/libraries/AP_HAL_AVR_SITL/Console.h
+++ b/libraries/AP_HAL_AVR_SITL/Console.h
@@ -25,6 +25,9 @@ public:
     void _printf_P(const prog_char *s, ...)
             __attribute__ ((format(__printf__, 2, 3)));
 
+    void vprintf(const char *s, va_list ap);
+    void vprintf_P(const prog_char *s, va_list ap);
+
     /* Implementations of Stream virtual methods */
     int16_t available();
     int16_t txspace();
diff --git a/libraries/AP_HAL_AVR_SITL/UARTDriver.cpp b/libraries/AP_HAL_AVR_SITL/UARTDriver.cpp
index dc50c403f4..97711c0e2b 100644
--- a/libraries/AP_HAL_AVR_SITL/UARTDriver.cpp
+++ b/libraries/AP_HAL_AVR_SITL/UARTDriver.cpp
@@ -25,7 +25,7 @@
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 
-#include "vprintf.h"
+#include "print_vprintf.h"
 #include "UARTDriver.h"
 #include "SITL_State.h"
 
@@ -182,18 +182,25 @@ void SITLUARTDriver::printf(const char *fmt, ...)
 {
     va_list ap;
     va_start(ap, fmt);
-    vprintf((AP_HAL::Print*)this, 0, fmt, ap);
+    vprintf(fmt, ap);
     va_end(ap);
 }
 
+void SITLUARTDriver::vprintf(const char *fmt, va_list ap) {
+    print_vprintf((AP_HAL::Print*)this, 0, fmt, ap);
+}
+
 void SITLUARTDriver::_printf_P(const prog_char *fmt, ...) 
 {
     va_list ap;
     va_start(ap, fmt);
-    vprintf((AP_HAL::Print*)this, 1, fmt, ap);
+    vprintf_P(fmt, ap);
     va_end(ap);
 }
 
+void SITLUARTDriver::vprintf_P(const prog_char *fmt, va_list ap) {
+    print_vprintf((AP_HAL::Print*)this, 1, fmt, ap);
+}
 /*
   start a TCP connection for the serial port. If wait_for_connection
   is true then block until a client connects
diff --git a/libraries/AP_HAL_AVR_SITL/UARTDriver.h b/libraries/AP_HAL_AVR_SITL/UARTDriver.h
index 822c01d0ba..e379148c85 100644
--- a/libraries/AP_HAL_AVR_SITL/UARTDriver.h
+++ b/libraries/AP_HAL_AVR_SITL/UARTDriver.h
@@ -46,6 +46,8 @@ public:
             __attribute__ ((format(__printf__, 2, 3)));
     void _printf_P(const prog_char *s, ...)
             __attribute__ ((format(__printf__, 2, 3)));
+    void vprintf(const char *s, va_list ap);
+    void vprintf_P(const prog_char *s, va_list ap);
 
     /* Implementations of Stream virtual methods */
     int16_t available();
diff --git a/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.cpp b/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.cpp
index 5e11d857e4..3b2d2515bc 100644
--- a/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.cpp
+++ b/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.cpp
@@ -14,11 +14,11 @@
 #include <AP_Progmem.h>
 #include <stdarg.h>
 #include <string.h>
-#include "vprintf.h"
+#include "print_vprintf.h"
 #include <stdio.h>
 #include <stdlib.h>
 
-void vprintf(AP_HAL::Print *s, unsigned char in_progmem, const char *fmt, va_list ap)
+void print_vprintf(AP_HAL::Print *s, unsigned char in_progmem, const char *fmt, va_list ap)
 {
         char *str = NULL;
         int i;
diff --git a/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.h b/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.h
index 6131d78392..0344abaea6 100644
--- a/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.h
+++ b/libraries/AP_HAL_AVR_SITL/utility/print_vprintf.h
@@ -5,7 +5,7 @@
 #include <AP_HAL.h>
 #include <stdarg.h>
 
-void vprintf (AP_HAL::Print *s, unsigned char in_progmem, const char *fmt, va_list ap);
+void print_vprintf (AP_HAL::Print *s, unsigned char in_progmem, const char *fmt, va_list ap);
 
 
 #endif //__AP_HAL_AVR_SITL_UTILITY_VPRINTF_H__