diff --git a/src/liblzma/check/crc_common.h b/src/liblzma/check/crc_common.h
index 1783b5e7..4764eb17 100644
--- a/src/liblzma/check/crc_common.h
+++ b/src/liblzma/check/crc_common.h
@@ -48,6 +48,11 @@
 // If both __forceinline and inline are used, MSVC will issue a warning.
 // Since MSVC's keyword is a replacement keyword, the lzma_always_inline
 // macro must also contain the inline keyword when its not used in MSVC.
+//
+// NOTE: This doesn't use lzma_always_inline for now as support for it is
+// detected using preprocessor macros which might miss a compiler that
+// does support it. All compilers that support the CLMUL code support
+// the attribute too; if not, we will hopefully get a bug report.
 #ifdef _MSC_VER
 #	define crc_always_inline __forceinline
 #else