diff --git a/ChangeLog b/ChangeLog
index 3a654a54..ccc6c83a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,7 +3,7 @@
 
 	* Fixed parser: memory leak in free_struct code for SET OF/SEQUENCE OF.
 	  (Severity: high, Security impact: medium)
-	* Fixed parser: invalid memory reference in CHECK.
+	* Fixed parser: invalid memory reference in code constructing tags.
 	  (Test case 48) (Severity: high, Security impact: medium)
 	  When encoding data for certain ASN.1 specifications containing
 	  explicit tags, the tag is always written incorrectly due to
diff --git a/asn1c/tests/check-assembly.sh b/asn1c/tests/check-assembly.sh
index a1756b4d..836c5e80 100755
--- a/asn1c/tests/check-assembly.sh
+++ b/asn1c/tests/check-assembly.sh
@@ -33,7 +33,7 @@ set +x
 
 # Create a Makefile for the project.
 cat > Makefile <<EOM
-CFLAGS=-I. -Wall -g ${CFLAGS} -DEMIT_ASN_DEBUG
+CFLAGS=-I. -W -Wall -Werror -g ${CFLAGS} -DEMIT_ASN_DEBUG
 SRCS=`echo *.c`
 OBJS=\${SRCS:.c=.o}
 check-executable: \${OBJS}