diff --git a/libretro-common/include/streams/file_stream.h b/libretro-common/include/streams/file_stream.h
index 40b867b007..5e6298d5df 100644
--- a/libretro-common/include/streams/file_stream.h
+++ b/libretro-common/include/streams/file_stream.h
@@ -31,6 +31,8 @@
 #include <retro_common_api.h>
 #include <boolean.h>
 
+#include <stdarg.h>
+
 RETRO_BEGIN_DECLS
 
 typedef struct RFILE RFILE;
@@ -81,6 +83,12 @@ bool filestream_write_file(const char *path, const void *data, ssize_t size);
 
 int filestream_putc(RFILE *stream, int c);
 
+int filestream_vprintf(RFILE *stream, const char* format, va_list args);
+
+int filestream_printf(RFILE *stream, const char* format, ...);
+
+int filestream_error(RFILE *stream);
+
 int filestream_get_fd(RFILE *stream);
 
 int filestream_flush(RFILE *stream);
diff --git a/libretro-common/include/streams/file_stream_transforms.h b/libretro-common/include/streams/file_stream_transforms.h
index 8921051154..81ff689f60 100644
--- a/libretro-common/include/streams/file_stream_transforms.h
+++ b/libretro-common/include/streams/file_stream_transforms.h
@@ -24,12 +24,12 @@
 #define __LIBRETRO_SDK_FILE_STREAM_TRANSFORMS_H
 
 #include <retro_common_api.h>
-
-#include <streams/file_stream.h>
 #include <string.h>
 
 RETRO_BEGIN_DECLS
 
+typedef struct RFILE RFILE;
+
 #define FILE RFILE
 
 #define fopen rfopen
@@ -38,9 +38,14 @@ RETRO_BEGIN_DECLS
 #define fseek rfseek
 #define fread rfread
 #define fgets rfgets
+#define fgetc rfgetc
 #define fwrite rfwrite
+#define fputc rfputc
+#define fprintf rfprintf
+#define ferror rferror
+#define feof rfeof
 
-RFILE* rfopen(const char *path, char *mode);
+RFILE* rfopen(const char *path, const char *mode);
 
 int rfclose(RFILE* stream);
 
@@ -53,9 +58,19 @@ size_t rfread(void* buffer,
 
 char *rfgets(char *buffer, int maxCount, RFILE* stream);
 
+int rfgetc(RFILE* stream);
+
 size_t rfwrite(void const* buffer,
    size_t elementSize, size_t elementCount, RFILE* stream);
 
+int rfputc(int character, RFILE * stream);
+
+int rfprintf(RFILE * stream, const char * format, ...);
+
+int rferror(RFILE* stream);
+
+int rfeof(RFILE* stream);
+
 RETRO_END_DECLS
 
 #endif
diff --git a/libretro-common/streams/file_stream.c b/libretro-common/streams/file_stream.c
index 46635532e3..5a9d4000a7 100644
--- a/libretro-common/streams/file_stream.c
+++ b/libretro-common/streams/file_stream.c
@@ -529,6 +529,34 @@ int filestream_putc(RFILE *stream, int c)
 #endif
 }
 
+int filestream_vprintf(RFILE *stream, const char* format, va_list args)
+{
+	static char buffer[8 * 1024];
+	int numChars = vsprintf(buffer, format, args);
+
+	if (numChars < 0)
+		return -1;
+	else if (numChars == 0)
+		return 0;
+
+	return filestream_write(stream, buffer, numChars);
+}
+
+int filestream_printf(RFILE *stream, const char* format, ...)
+{
+	va_list vl;
+   int result;
+	va_start(vl, format);
+	result = filestream_vprintf(stream, format, vl);
+	va_end(vl);
+	return result;
+}
+
+int filestream_error(RFILE *stream)
+{
+	return ferror(stream->fp);
+}
+
 int filestream_close(RFILE *stream)
 {
    if (!stream)
diff --git a/libretro-common/streams/file_stream_transforms.c b/libretro-common/streams/file_stream_transforms.c
index f43ee7b25a..d1e8f2f26e 100644
--- a/libretro-common/streams/file_stream_transforms.c
+++ b/libretro-common/streams/file_stream_transforms.c
@@ -22,8 +22,9 @@
 
 #include <streams/file_stream.h>
 #include <string.h>
+#include <stdarg.h>
 
-RFILE* rfopen(const char *path, char *mode)
+RFILE* rfopen(const char *path, const char *mode)
 {
    unsigned int retro_mode = RFILE_MODE_READ_TEXT;
    if (strstr(mode, "r"))
@@ -64,8 +65,38 @@ char *rfgets(char *buffer, int maxCount, RFILE* stream)
    return filestream_gets(stream, buffer, maxCount);
 }
 
+int rfgetc(RFILE* stream)
+{
+	return filestream_getc(stream);
+}
+
 size_t rfwrite(void const* buffer,
    size_t elementSize, size_t elementCount, RFILE* stream)
 {
    return filestream_write(stream, buffer, elementSize*elementCount);
 }
+
+int rfputc(int character, RFILE * stream)
+{
+    return filestream_putc(stream, character);
+}
+
+int rfprintf(RFILE * stream, const char * format, ...)
+{
+   int result;
+	va_list vl;
+	va_start(vl, format);
+	result = filestream_vprintf(stream, format, vl);
+	va_end(vl);
+	return result;
+}
+
+int rferror(RFILE* stream)
+{
+    return filestream_error(stream);
+}
+
+int rfeof(RFILE* stream)
+{
+    return filestream_eof(stream);
+}