diff --git a/libpsx/include/stdio.h b/libpsx/include/stdio.h
index 6ffd4e0..0e093d9 100644
--- a/libpsx/include/stdio.h
+++ b/libpsx/include/stdio.h
@@ -85,7 +85,7 @@ int puts(const char *str);
  */
 
 extern int printf(const char *format, ...);
-
+int fprintf(FILE *fd, const char *format, ...);
 
 #ifdef __IN_LIBPSX
 
diff --git a/libpsx/src/libc/printf.c b/libpsx/src/libc/printf.c
index a278435..d2deeb0 100644
--- a/libpsx/src/libc/printf.c
+++ b/libpsx/src/libc/printf.c
@@ -853,6 +853,22 @@ int vsprintf(char *string, const char *fmt, va_list ap)
 	return vsnprintf(string, 0xffffffff, fmt, ap);
 }
 
+int fprintf(FILE *const fd, const char *fmt, ...)
+{
+	if (fd == stdout || fd == stderr)
+	{
+		int r;
+		va_list ap;
+
+		va_start(ap, fmt);
+		r = vprintf(fmt, ap);
+		va_end(ap);
+		return r;
+	}
+
+	return -1;
+}
+
 int sprintf(char *string, const char *fmt, ...)
 {
 	int r;