diff --git a/src/gamelog.cpp b/src/gamelog.cpp
index b21823c95b..940d9a8247 100644
--- a/src/gamelog.cpp
+++ b/src/gamelog.cpp
@@ -75,6 +75,7 @@ void GamelogFree(LoggedAction *gamelog_action, uint gamelog_actions)
 		for (uint j = 0; j < la->changes; j++) {
 			const LoggedChange *lc = &la->change[j];
 			if (lc->ct == GLCT_SETTING) free(lc->setting.name);
+			if (lc->ct == GLCT_REVISION) free(lc->revision.text);
 		}
 		free(la->change);
 	}
@@ -414,8 +415,7 @@ void GamelogRevision()
 	LoggedChange *lc = GamelogChange(GLCT_REVISION);
 	if (lc == NULL) return;
 
-	memset(lc->revision.text, 0, sizeof(lc->revision.text));
-	strecpy(lc->revision.text, _openttd_revision, lastof(lc->revision.text), true);
+	lc->revision.text = stredup(_openttd_revision);
 	lc->revision.slver = SAVEGAME_VERSION;
 	lc->revision.modified = _openttd_revision_modified;
 	lc->revision.newgrf = _openttd_newgrf_version;
diff --git a/src/gamelog_internal.h b/src/gamelog_internal.h
index ad9921f4e8..daa5436968 100644
--- a/src/gamelog_internal.h
+++ b/src/gamelog_internal.h
@@ -42,7 +42,7 @@ struct LoggedChange {
 			byte landscape;  ///< landscape (temperate, arctic, ...)
 		} mode;
 		struct {
-			char text[NETWORK_REVISION_LENGTH]; ///< revision string, _openttd_revision
+			char *text;      ///< revision string, _openttd_revision
 			uint32 newgrf;   ///< _openttd_newgrf_version
 			uint16 slver;    ///< _sl_version
 			byte modified;   ///< _openttd_revision_modified
diff --git a/src/saveload/extended_ver_sl.cpp b/src/saveload/extended_ver_sl.cpp
index 3b3084427f..258a70bff2 100644
--- a/src/saveload/extended_ver_sl.cpp
+++ b/src/saveload/extended_ver_sl.cpp
@@ -71,6 +71,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
 	{ XSLFI_TEMPLATE_REPLACEMENT,   XSCF_NULL,                1,   1, "template_replacement",      NULL, NULL, "TRPL,TMPL" },
 	{ XSLFI_MORE_RAIL_TYPES,        XSCF_NULL,                1,   1, "more_rail_types",           NULL, NULL, NULL        },
 	{ XSLFI_CARGO_TYPE_ORDERS,      XSCF_NULL,                1,   1, "cargo_type_orders",         NULL, NULL, "ORDX"      },
+	{ XSLFI_EXTENDED_GAMELOG,       XSCF_NULL,                1,   1, "extended_gamelog",          NULL, NULL, NULL        },
 
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, NULL, NULL, NULL, NULL },// This is the end marker
 };
diff --git a/src/saveload/extended_ver_sl.h b/src/saveload/extended_ver_sl.h
index 68b3a57e63..c339d8a8b7 100644
--- a/src/saveload/extended_ver_sl.h
+++ b/src/saveload/extended_ver_sl.h
@@ -45,6 +45,7 @@ enum SlXvFeatureIndex {
 	XSLFI_TEMPLATE_REPLACEMENT,                   ///< Template-based train replacement
 	XSLFI_MORE_RAIL_TYPES,                        ///< Increased number of rail types
 	XSLFI_CARGO_TYPE_ORDERS,                      ///< Cargo-specific load/unload order flags
+	XSLFI_EXTENDED_GAMELOG,                       ///< Extended gamelog
 
 	XSLFI_RIFF_HEADER_60_BIT,                     ///< Size field in RIFF chunk header is 60 bit
 	XSLFI_HEIGHT_8_BIT,                           ///< Map tile height is 8 bit instead of 4 bit, but savegame version may be before this became true in trunk
diff --git a/src/saveload/gamelog_sl.cpp b/src/saveload/gamelog_sl.cpp
index f818eca137..1810c39fa2 100644
--- a/src/saveload/gamelog_sl.cpp
+++ b/src/saveload/gamelog_sl.cpp
@@ -28,8 +28,11 @@ static const SaveLoad _glog_mode_desc[] = {
 	SLE_END()
 };
 
+static char old_revision_text[NETWORK_REVISION_LENGTH];
+
 static const SaveLoad _glog_revision_desc[] = {
-	SLE_ARR(LoggedChange, revision.text,     SLE_UINT8,  NETWORK_REVISION_LENGTH),
+	SLEG_CONDARR_X(old_revision_text,        SLE_UINT8, NETWORK_REVISION_LENGTH, 0, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_EXTENDED_GAMELOG, 0, 0)),
+	SLE_CONDSTR_X(LoggedChange, revision.text, SLE_STR,                       0, 0, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_EXTENDED_GAMELOG)),
 	SLE_VAR(LoggedChange, revision.newgrf,   SLE_UINT32),
 	SLE_VAR(LoggedChange, revision.slver,    SLE_UINT16),
 	SLE_VAR(LoggedChange, revision.modified, SLE_UINT8),
@@ -132,6 +135,9 @@ static void Load_GLOG_common(LoggedAction *&gamelog_action, uint &gamelog_action
 			assert((uint)ct < GLCT_END);
 
 			SlObject(lc, _glog_desc[ct]);
+			if (ct == GLCT_REVISION && SlXvIsFeatureMissing(XSLFI_EXTENDED_GAMELOG)) {
+				lc->revision.text = stredup(old_revision_text);
+			}
 		}
 	}
 }