diff --git a/src/xz/coder.c b/src/xz/coder.c
index 224c2d3..98e9783 100644
--- a/src/xz/coder.c
+++ b/src/xz/coder.c
@@ -611,10 +611,21 @@ coder_init(file_pair *pair)
 		// memory usage limit in case it happens in the first
 		// Block of the first Stream, which is where it very
 		// probably will happen if it is going to happen.
+		//
+		// This will also catch unsupported check type which
+		// we treat as a warning only. If there are empty
+		// concatenated Streams with unsupported check type then
+		// the message can be shown more than once here. The loop
+		// is used in case there is first a warning about
+		// unsupported check type and then the first Block
+		// would exceed the memlimit.
 		if (ret == LZMA_OK && init_format != FORMAT_RAW) {
 			strm.next_out = NULL;
 			strm.avail_out = 0;
-			ret = lzma_code(&strm, LZMA_RUN);
+			while ((ret = lzma_code(&strm, LZMA_RUN))
+					== LZMA_UNSUPPORTED_CHECK)
+				message_warning("%s: %s", pair->src_name,
+						message_strm(ret));
 		}
 #endif
 	}
@@ -825,9 +836,9 @@ coder_normal(file_pair *pair)
 
 		} else if (ret != LZMA_OK) {
 			// Determine if the return value indicates that we
-			// won't continue coding.
-			const bool stop = ret != LZMA_NO_CHECK
-					&& ret != LZMA_UNSUPPORTED_CHECK;
+			// won't continue coding. LZMA_NO_CHECK would be
+			// here too if LZMA_TELL_ANY_CHECK was used.
+			const bool stop = ret != LZMA_UNSUPPORTED_CHECK;
 
 			if (stop) {
 				// Write the remaining bytes even if something