3 files changed, 22 insertions, 0 deletions
diff --git a/src/liblzma/common/filter_common.c b/src/liblzma/common/filter_common.c
index a803b4c2..c8694e2c 100644
--- a/src/liblzma/common/filter_common.c
+++ b/src/liblzma/common/filter_common.c
@@ -42,6 +42,13 @@ static const struct {
 		.last_ok = true,
 		.changes_size = true,
 	},
+	{
+		.id = LZMA_FILTER_LZMA1EXT,
+		.options_size = sizeof(lzma_options_lzma),
+		.non_last_ok = false,
+		.last_ok = true,
+		.changes_size = true,
+	},
 #endif
 #if defined(HAVE_ENCODER_LZMA2) || defined(HAVE_DECODER_LZMA2)
 	{
diff --git a/src/liblzma/common/filter_decoder.c b/src/liblzma/common/filter_decoder.c
index b031ac62..fa53f5bd 100644
--- a/src/liblzma/common/filter_decoder.c
+++ b/src/liblzma/common/filter_decoder.c
@@ -50,6 +50,12 @@ static const lzma_filter_decoder decoders[] = {
 		.memusage = &lzma_lzma_decoder_memusage,
 		.props_decode = &lzma_lzma_props_decode,
 	},
+	{
+		.id = LZMA_FILTER_LZMA1EXT,
+		.init = &lzma_lzma_decoder_init,
+		.memusage = &lzma_lzma_decoder_memusage,
+		.props_decode = &lzma_lzma_props_decode,
+	},
 #endif
 #ifdef HAVE_DECODER_LZMA2
 	{
diff --git a/src/liblzma/common/filter_encoder.c b/src/liblzma/common/filter_encoder.c
index 5d6c1a7e..978b7a6b 100644
--- a/src/liblzma/common/filter_encoder.c
+++ b/src/liblzma/common/filter_encoder.c
@@ -64,6 +64,15 @@ static const lzma_filter_encoder encoders[] = {
 		.props_size_fixed = 5,
 		.props_encode = &lzma_lzma_props_encode,
 	},
+	{
+		.id = LZMA_FILTER_LZMA1EXT,
+		.init = &lzma_lzma_encoder_init,
+		.memusage = &lzma_lzma_encoder_memusage,
+		.block_size = NULL, // Not needed for LZMA1
+		.props_size_get = NULL,
+		.props_size_fixed = 5,
+		.props_encode = &lzma_lzma_props_encode,
+	},
 #endif
 #ifdef HAVE_ENCODER_LZMA2
 	{