diff --git a/src/liblzma/simple/ia64.c b/src/liblzma/simple/ia64.c
index 59830521..e29e5ad6 100644
--- a/src/liblzma/simple/ia64.c
+++ b/src/liblzma/simple/ia64.c
@@ -97,7 +97,7 @@ ia64_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
 		const lzma_filter_info *filters, bool is_encoder)
 {
 	return lzma_simple_coder_init(next, allocator, filters,
-			&ia64_code, 0, 4, is_encoder);
+			&ia64_code, 0, 16, is_encoder);
 }