diff --git a/drivers/unix/file_access_unix.cpp b/drivers/unix/file_access_unix.cpp
index 2869f58f81a..5f21b9ba67d 100644
--- a/drivers/unix/file_access_unix.cpp
+++ b/drivers/unix/file_access_unix.cpp
@@ -205,6 +205,11 @@ void FileAccessUnix::store_8(uint8_t p_dest) {
 	fwrite(&p_dest, 1, 1, f);
 }
 
+void FileAccessUnix::store_buffer(const uint8_t *p_src, int p_length) {
+	ERR_FAIL_COND(!f);
+	ERR_FAIL_COND(fwrite(p_src, 1, p_length, f) != p_length);
+}
+
 bool FileAccessUnix::file_exists(const String &p_path) {
 
 	FILE *g;
diff --git a/drivers/unix/file_access_unix.h b/drivers/unix/file_access_unix.h
index 6497e4caef3..2d93911b360 100644
--- a/drivers/unix/file_access_unix.h
+++ b/drivers/unix/file_access_unix.h
@@ -73,6 +73,7 @@ public:
 	virtual Error get_error() const; ///< get last error
 
 	virtual void store_8(uint8_t p_dest); ///< store a byte
+	virtual void store_buffer(const uint8_t *p_src, int p_length); ///< store an array of bytes
 
 	virtual bool file_exists(const String &p_path); ///< return true if a file exists
 
diff --git a/drivers/windows/file_access_windows.cpp b/drivers/windows/file_access_windows.cpp
index b1e4d391347..49764f63753 100644
--- a/drivers/windows/file_access_windows.cpp
+++ b/drivers/windows/file_access_windows.cpp
@@ -213,6 +213,11 @@ void FileAccessWindows::store_8(uint8_t p_dest) {
 	fwrite(&p_dest, 1, 1, f);
 }
 
+void FileAccessWindows::store_buffer(const uint8_t *p_src, int p_length) {
+	ERR_FAIL_COND(!f);
+	ERR_FAIL_COND(fwrite(p_src, 1, p_length, f) != p_length);
+}
+
 bool FileAccessWindows::file_exists(const String &p_name) {
 
 	FILE *g;
diff --git a/drivers/windows/file_access_windows.h b/drivers/windows/file_access_windows.h
index b62ac9c6b20..c001549438e 100644
--- a/drivers/windows/file_access_windows.h
+++ b/drivers/windows/file_access_windows.h
@@ -65,6 +65,7 @@ public:
 	virtual Error get_error() const; ///< get last error
 
 	virtual void store_8(uint8_t p_dest); ///< store a byte
+	virtual void store_buffer(const uint8_t *p_src, int p_length); ///< store an array of bytes
 
 	virtual bool file_exists(const String &p_name); ///< return true if a file exists