diff --git a/src/liblzma/simple/arm.c b/src/liblzma/simple/arm.c
index 46960fc8..8fcf6437 100644
--- a/src/liblzma/simple/arm.c
+++ b/src/liblzma/simple/arm.c
@@ -49,7 +49,7 @@ arm_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,
-			&arm_code, 0, 4, is_encoder);
+			&arm_code, 0, 4, 4, is_encoder);
 }
 
 
diff --git a/src/liblzma/simple/armthumb.c b/src/liblzma/simple/armthumb.c
index e20151cc..eb6a69d1 100644
--- a/src/liblzma/simple/armthumb.c
+++ b/src/liblzma/simple/armthumb.c
@@ -54,7 +54,7 @@ armthumb_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,
-			&armthumb_code, 0, 4, is_encoder);
+			&armthumb_code, 0, 4, 2, is_encoder);
 }
 
 
diff --git a/src/liblzma/simple/ia64.c b/src/liblzma/simple/ia64.c
index 60247b32..fd263d4a 100644
--- a/src/liblzma/simple/ia64.c
+++ b/src/liblzma/simple/ia64.c
@@ -90,7 +90,7 @@ 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, 16, is_encoder);
+			&ia64_code, 0, 16, 16, is_encoder);
 }
 
 
diff --git a/src/liblzma/simple/powerpc.c b/src/liblzma/simple/powerpc.c
index 7ae734c9..aaa14f22 100644
--- a/src/liblzma/simple/powerpc.c
+++ b/src/liblzma/simple/powerpc.c
@@ -53,7 +53,7 @@ powerpc_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,
-			&powerpc_code, 0, 4, is_encoder);
+			&powerpc_code, 0, 4, 4, is_encoder);
 }
 
 
diff --git a/src/liblzma/simple/simple_coder.c b/src/liblzma/simple/simple_coder.c
index d44d632b..497949a3 100644
--- a/src/liblzma/simple/simple_coder.c
+++ b/src/liblzma/simple/simple_coder.c
@@ -215,7 +215,8 @@ lzma_simple_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
 		const lzma_filter_info *filters,
 		size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
 			bool is_encoder, uint8_t *buffer, size_t size),
-		size_t simple_size, size_t unfiltered_max, bool is_encoder)
+		size_t simple_size, size_t unfiltered_max,
+		uint32_t alignment, bool is_encoder)
 {
 	// Allocate memory for the lzma_coder structure if needed.
 	if (next->coder == NULL) {
@@ -249,6 +250,8 @@ lzma_simple_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
 	if (filters[0].options != NULL) {
 		const lzma_options_bcj *simple = filters[0].options;
 		next->coder->now_pos = simple->start_offset;
+		if (next->coder->now_pos & (alignment - 1))
+			return LZMA_OPTIONS_ERROR;
 	} else {
 		next->coder->now_pos = 0;
 	}
diff --git a/src/liblzma/simple/simple_private.h b/src/liblzma/simple/simple_private.h
index 7571ae21..a69f8278 100644
--- a/src/liblzma/simple/simple_private.h
+++ b/src/liblzma/simple/simple_private.h
@@ -70,6 +70,7 @@ extern lzma_ret lzma_simple_coder_init(lzma_next_coder *next,
 		lzma_allocator *allocator, const lzma_filter_info *filters,
 		size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
 			bool is_encoder, uint8_t *buffer, size_t size),
-		size_t simple_size, size_t unfiltered_max, bool is_encoder);
+		size_t simple_size, size_t unfiltered_max,
+		uint32_t alignment, bool is_encoder);
 
 #endif
diff --git a/src/liblzma/simple/sparc.c b/src/liblzma/simple/sparc.c
index 04d42829..808a59aa 100644
--- a/src/liblzma/simple/sparc.c
+++ b/src/liblzma/simple/sparc.c
@@ -61,7 +61,7 @@ sparc_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,
-			&sparc_code, 0, 4, is_encoder);
+			&sparc_code, 0, 4, 4, is_encoder);
 }
 
 
diff --git a/src/liblzma/simple/x86.c b/src/liblzma/simple/x86.c
index 425eae9a..5d1509bb 100644
--- a/src/liblzma/simple/x86.c
+++ b/src/liblzma/simple/x86.c
@@ -127,7 +127,7 @@ x86_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
 		const lzma_filter_info *filters, bool is_encoder)
 {
 	const lzma_ret ret = lzma_simple_coder_init(next, allocator, filters,
-			&x86_code, sizeof(lzma_simple), 5, is_encoder);
+			&x86_code, sizeof(lzma_simple), 5, 1, is_encoder);
 
 	if (ret == LZMA_OK) {
 		next->coder->simple->prev_mask = 0;