diff --git a/firmware/common/sprintf.c b/firmware/common/sprintf.c
index a44ca29560..c700034f49 100644
--- a/firmware/common/sprintf.c
+++ b/firmware/common/sprintf.c
@@ -174,6 +174,8 @@ int vsnprintf(char *buf, int size, const char *fmt, va_list ap)
     return pr.bytes;
 }
 
+#ifndef SIMULATOR
+
 struct for_fprintf {
     int fd;    /* where to store it */
     int bytes; /* amount stored */
@@ -193,8 +195,6 @@ static int fprfunc(void *pr, unsigned char letter)
 }
 
 
-#ifndef SIMULATOR
-
 int fprintf(int fd, const char *fmt, ...)
 {
     bool ok;