diff --git a/src/liblzma/common/alone_decoder.c b/src/liblzma/common/alone_decoder.c
index 77d0a9b1..239b230e 100644
--- a/src/liblzma/common/alone_decoder.c
+++ b/src/liblzma/common/alone_decoder.c
@@ -50,8 +50,7 @@ typedef struct {
 
 
 static lzma_ret
-alone_decode(void *coder_ptr,
-		const lzma_allocator *allocator lzma_attribute((__unused__)),
+alone_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
diff --git a/src/liblzma/common/alone_encoder.c b/src/liblzma/common/alone_encoder.c
index 402bebce..c4560d58 100644
--- a/src/liblzma/common/alone_encoder.c
+++ b/src/liblzma/common/alone_encoder.c
@@ -31,8 +31,7 @@ typedef struct {
 
 
 static lzma_ret
-alone_encode(void *coder_ptr,
-		const lzma_allocator *allocator lzma_attribute((__unused__)),
+alone_encode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,
diff --git a/src/liblzma/lz/lz_decoder.c b/src/liblzma/lz/lz_decoder.c
index 6c9024e2..09b57438 100644
--- a/src/liblzma/lz/lz_decoder.c
+++ b/src/liblzma/lz/lz_decoder.c
@@ -131,8 +131,7 @@ decode_buffer(lzma_coder *coder,
 
 
 static lzma_ret
-lz_decode(void *coder_ptr,
-		const lzma_allocator *allocator lzma_attribute((__unused__)),
+lz_decode(void *coder_ptr, const lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
 		size_t in_size, uint8_t *restrict out,
 		size_t *restrict out_pos, size_t out_size,