diff --git a/src/c/Makefile.in b/src/c/Makefile.in
index 0a92696df..07add8a6a 100644
--- a/src/c/Makefile.in
+++ b/src/c/Makefile.in
@@ -19,6 +19,10 @@ CFLAGS	= -I. -I@true_builddir@ -I$(srcdir) -I../ecl/gc -DECL_API -DECL_NO_LEGACY
 #  -Wwrite-strings -Wconversion -Wsign-compare -Wmissing-prototypes \
 #  -Wredundant-decls -Wunreachable-code -Winline
 
+# ECL should build without problems when we error on all warning
+# except shift-count-overflow
+#  -Werror -Wno-error=shift-count-overflow
+
 SHELL	= /bin/sh
 RM	= @RM@
 EXE	= @EXEEXT@