diff --git a/lib/Makefile b/lib/Makefile
index fc96bbd..74ddd59 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -184,6 +184,9 @@ ifeq ($(BUILD_STATIC),yes)
 	$(Q)$(INSTALL_DATA) lz4frame_static.h $(DESTDIR)$(includedir)/lz4frame_static.h
 endif
 ifeq ($(BUILD_SHARED),yes)
+# Traditionnally, one installs the DLLs in the bin directory as programs
+# search them first in their directory. This allows to not pollute system
+# directories (like c:/windows/system32), nor modify the PATH variable.
 ifneq (,$(filter Windows%,$(OS)))
 	$(Q)$(INSTALL_PROGRAM) dll/$(LIBLZ4).dll $(DESTDIR)$(bindir)
 	$(Q)$(INSTALL_PROGRAM) dll/liblz4.lib $(DESTDIR)$(libdir)