diff --git a/Makefile b/Makefile
index d8e740bd..6e83f33a 100644
--- a/Makefile
+++ b/Makefile
@@ -120,7 +120,7 @@ asan: clean
 	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=address"
 
 msan: clean
-	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=memory"   # datagen.c used to fail this test for no obvious reason
+	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=memory -fno-omit-frame-pointer"   # datagen.c fails this test for no obvious reason
 
 asan32: clean
 	$(MAKE) -C $(PRGDIR) test32 CC=clang MOREFLAGS="-g -fsanitize=address"
diff --git a/NEWS b/NEWS
index 5e46e0a7..2202d192 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 v0.8.1
 Changed : -i# now selects benchmark time in second
 Fixed : ZSTD_compress* can now compress > 4 GB in a single pass, reported by Nick Terrell
+Fixed : speed regression for specific patterns (#272)
 
 v0.8.0
 Improved : better speed on clang and gcc -O2, thanks to Eric Biggers