8 files changed, 16 insertions, 8 deletions
diff --git a/engines/glk/frotz/detection.cpp b/engines/glk/frotz/detection.cpp
index b1d751a313..6e1d23c963 100644
--- a/engines/glk/frotz/detection.cpp
+++ b/engines/glk/frotz/detection.cpp
@@ -122,6 +122,7 @@ bool FrotzMetaEngine::readSavegameHeader(Common::SeekableReadStream *stream, Glk
 	if (stream->readUint32BE() != MKTAG('I', 'F', 'Z', 'S'))
 		return false;
 
+	header._interpType = INTERPRETER_FROTZ;
 	header._saveName = _("Unnamed savegame");
 
 	while (stream->pos() < stream->size()) {
@@ -143,6 +144,7 @@ bool FrotzMetaEngine::readSavegameHeader(Common::SeekableReadStream *stream, Glk
 		}
 	}
 
+	stream->seek(0);
 	return true;
 }
 
diff --git a/engines/glk/frotz/frotz.cpp b/engines/glk/frotz/frotz.cpp
index 421b7785a6..993c65e8e2 100644
--- a/engines/glk/frotz/frotz.cpp
+++ b/engines/glk/frotz/frotz.cpp
@@ -64,7 +64,7 @@ void Frotz::initialize() {
 	z_restart();
 }
 
-Common::Error Frotz::saveGameData(strid_t file) {
+Common::Error Frotz::saveGameData(strid_t file, const Common::String &desc) {
 #ifdef TODO
 	long pc;
 	zword addr;
diff --git a/engines/glk/frotz/frotz.h b/engines/glk/frotz/frotz.h
index 22604e59bd..28902c5665 100644
--- a/engines/glk/frotz/frotz.h
+++ b/engines/glk/frotz/frotz.h
@@ -71,7 +71,7 @@ public:
 	/**
 	 * Save the game to the passed stream
 	 */
-	virtual Common::Error saveGameData(strid_t file) override;
+	virtual Common::Error saveGameData(strid_t file, const Common::String &desc) override;
 };
 
 extern Frotz *g_vm;
diff --git a/engines/glk/glk.cpp b/engines/glk/glk.cpp
index 98ce410d68..a22f9e9aca 100644
--- a/engines/glk/glk.cpp
+++ b/engines/glk/glk.cpp
@@ -186,7 +186,7 @@ Common::Error GlkEngine::saveGameState(int slot, const Common::String &desc) {
 	if (file == nullptr)
 		return Common::kWritingFailed;
 
-	Common::Error result = saveGameData(file);
+	Common::Error result = saveGameData(file, desc);
 
 	file->close();
 	return result;
diff --git a/engines/glk/glk.h b/engines/glk/glk.h
index 526755b1aa..923e29587f 100644
--- a/engines/glk/glk.h
+++ b/engines/glk/glk.h
@@ -209,7 +209,7 @@ public:
 	/**
 	 * Save the game to the passed file
 	 */
-	virtual Common::Error saveGameData(strid_t file) = 0;
+	virtual Common::Error saveGameData(strid_t file, const Common::String &desc) = 0;
 };
 
 extern GlkEngine *g_vm;
diff --git a/engines/glk/scott/scott.cpp b/engines/glk/scott/scott.cpp
index eb8cd404c2..1efc683ab0 100644
--- a/engines/glk/scott/scott.cpp
+++ b/engines/glk/scott/scott.cpp
@@ -508,7 +508,7 @@ void Scott::lineInput(char *buf, size_t n) {
 	buf[ev.val1] = 0;
 }
 
-Common::Error Scott::saveGameData(strid_t file) {
+Common::Error Scott::saveGameData(strid_t file, const Common::String &desc) {
 	Common::String msg;
 
 	for (int ct = 0; ct < 16; ct++) {
diff --git a/engines/glk/scott/scott.h b/engines/glk/scott/scott.h
index ad1313d5d4..b490fd6412 100644
--- a/engines/glk/scott/scott.h
+++ b/engines/glk/scott/scott.h
@@ -184,7 +184,7 @@ public:
 	/**
 	 * Save the game to the passed stream
 	 */
-	virtual Common::Error saveGameData(strid_t file) override;
+	virtual Common::Error saveGameData(strid_t file, const Common::String &desc) override;
 };
 
 } // End of namespace Scott
diff --git a/engines/glk/streams.cpp b/engines/glk/streams.cpp
index 911f6d92bb..80f03dd7cb 100644
--- a/engines/glk/streams.cpp
+++ b/engines/glk/streams.cpp
@@ -25,6 +25,7 @@
 #include "glk/events.h"
 #include "glk/glk.h"
 #include "glk/windows.h"
+#include "glk/frotz/detection.h"
 #include "gui/saveload.h"
 #include "common/file.h"
 #include "common/savefile.h"
@@ -771,7 +772,9 @@ FileStream::FileStream(Streams *streams, frefid_t fref, glui32 fmode, glui32 roc
 		if (!_outFile)
 			error("Could open file for writing - %s", fname.c_str());
 
-		if (fref->_slotNumber != -1)
+		// For creating savegames, write out the header. Frotz is a special case,
+		// since the Quetzal format is used for compatibility
+		if (fref->_slotNumber != -1 && g_vm->getInterpreterType() != INTERPRETER_FROTZ)
 			writeSavegameHeader(_outFile, fref->_description);
 	} else if (fmode == filemode_Read) {
 		if (_file.open(fname)) {
@@ -787,8 +790,11 @@ FileStream::FileStream(Streams *streams, frefid_t fref, glui32 fmode, glui32 roc
 		if (_inFile) {
 			// It's a save file, so skip over the header
 			SavegameHeader header;
-			if (!readSavegameHeader(_inStream, header))
+			if (!(g_vm->getInterpreterType() == INTERPRETER_FROTZ ?
+					Frotz::FrotzMetaEngine::readSavegameHeader(_inStream, header) :
+					readSavegameHeader(_inStream, header)))
 				error("Invalid savegame");
+
 			if (header._interpType != g_vm->getInterpreterType() || header._language != g_vm->getLanguage()
 			        || header._md5 != g_vm->getGameMD5())
 				error("Savegame is for a different game");