diff --git a/libasn1parser/asn1p_expr.c b/libasn1parser/asn1p_expr.c
index 5e2aa34..f5626a7 100644
--- a/libasn1parser/asn1p_expr.c
+++ b/libasn1parser/asn1p_expr.c
@@ -144,7 +144,7 @@
 
 
 char *asn1p_tag2string(struct asn1p_type_tag_s *tag, char *buf) {
-	static buf_stat[TAG2STRING_BUFFER_SIZE];
+	static char buf_stat[TAG2STRING_BUFFER_SIZE];
 	char *start;
 	char *end;
 
@@ -170,7 +170,7 @@
 	}
 	buf += snprintf(buf + strlen(buf), end - buf,
 		"%" PRIdASN "]", tag->tag_value);
-	assert((buf - end) > sizeof(" IMPLICIT "));
+	assert((unsigned int)(buf - end) > sizeof(" IMPLICIT "));
 
 	switch(tag->tag_mode) {
 	case TM_DEFAULT: break;