diff --git a/Makefile b/Makefile
index 0a30bfa..3480c99 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ options:
 ${OBJ}: config.mk
 
 cmarkdown: ${OBJ}
-	@echo CC -o $@
+	@echo LD $@
 	@${CC} -o $@ ${OBJ} ${LDFLAGS}
 
 clean:
diff --git a/cmarkdown.c b/cmarkdown.c
index 5d873f5..9891ad4 100644
--- a/cmarkdown.c
+++ b/cmarkdown.c
@@ -64,8 +64,8 @@ struct Tag lineprefix[] = {
 	{ "# ",		1,	"<h1>",		"</h1>" },
 };
 struct Tag underline[] = {
-	{ "=",		1,	"<h1>",		"</h1>" },
-	{ "-",		1,	"<h2>",		"</h2>" },
+	{ "=",		1,	"<h1>",		"</h1>\n" },
+	{ "-",		1,	"<h2>",		"</h2>\n" },
 };
 struct Tag surround[] = {
 	{ "``",		0,	"<code>",	"</code>" },
@@ -78,7 +78,6 @@ struct Tag surround[] = {
 char * replace[][2] = {
 	{ "\n- - -\n",	"\n<hr />\n" },
 	{ "\n- - - \n",	"\n<hr />\n" },
-	{ " #######\n",	"\n" },
 	{ " ######\n",	"\n" },
 	{ " #####\n",	"\n" },
 	{ " ####\n",	"\n" },
@@ -134,7 +133,8 @@ doamp(const char *begin, const char *end, int newblock) {
 unsigned int
 dohtml(const char *begin, const char *end, int newblock) {
 	const char *p, *tag, *tagend;
-	if(nohtml || *begin != '\n' || !*begin)
+
+	if(nohtml || !newblock || *begin == '\n')
 		return 0;
 	p = begin;
 	if(p[1] == '\n')
@@ -533,4 +533,3 @@ main(int argc, char *argv[]) {
 	free(buffer);
 	return EXIT_SUCCESS;
 }
-
diff --git a/config.mk b/config.mk
index b37839b..577b368 100644
--- a/config.mk
+++ b/config.mk
@@ -10,7 +10,7 @@ INCS = -I. -I/usr/include
 LIBS = -L/usr/lib
 
 # flags
-CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\" -Wall
+CFLAGS = -Os -Wall -Werror ${INCS} -DVERSION=\"${VERSION}\"
 LDFLAGS = ${LIBS}
 
 # compiler