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-rw-r--r--bootloader/common.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/bootloader/common.h b/bootloader/common.h
index 6713585ad8..7d5425c9c8 100644
--- a/bootloader/common.h
+++ b/bootloader/common.h
@@ -41,7 +41,7 @@ extern bool verbose;
/* Functions common to all bootloaders */
void reset_screen(void);
-void printf(const char *format, ...);
+int printf(const char *format, ...);
char *strerror(int error);
void error(int errortype, int error, bool shutdown);
int load_firmware(unsigned char* buf, char* firmware, int buffer_size);