Clarify that Win7 SP0 crash was a regression
diff --git a/ChangeLog.md b/ChangeLog.md
index 47c730b..1b9ac69 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -14,8 +14,9 @@
if the soft float ABI is enabled. Those functions use instructions that are
incompatible with the soft float ABI.
-3. Fixed an issue in the SIMD feature detection code that caused libjpeg-turbo
-to crash on Windows 7 if Service Pack 1 was not installed.
+3. Fixed a regression in the SIMD feature detection code, introduced by
+the AVX2 SIMD extensions (2.0 beta1[1]), that caused libjpeg-turbo to crash on
+Windows 7 if Service Pack 1 was not installed.
2.0.0
