diff --git a/adaptive_compress.c b/adaptive_compress.c
index 09b97db..b7f6f21 100644
--- a/adaptive_compress.c
+++ b/adaptive_compress.c
@@ -288,7 +288,7 @@ adapt_compress(void *src, uint64_t srclen, void *dst,
 	} else {
 #ifdef ENABLE_PC_LIBBSC
 		if (adat->bsc_data && (PC_SUBTYPE(btype) == TYPE_MARKUP ||
-		    PC_SUBTYPE(btype) == TYPE_BMP)) {
+		    PC_SUBTYPE(btype) == TYPE_BMP || PC_SUBTYPE(btype) == TYPE_DNA_SEQ)) {
 			rv = libbsc_compress(src, srclen, dst, dstlen, level, chdr, btype, adat->bsc_data);
 			if (rv < 0)
 				return (rv);
diff --git a/pcompress.c b/pcompress.c
index f7cb3f1..81e2fc2 100644
--- a/pcompress.c
+++ b/pcompress.c
@@ -2050,7 +2050,12 @@ start_compress(pc_ctx_t *pctx, const char *filename, uint64_t chunksize, int lev
 				}
 				add_fname(tmpfile1);
 			} else {
-				snprintf(to_filename, sizeof (to_filename), "%s" COMP_EXTN, pctx->to_filename);
+				if (!endswith(pctx->to_filename, COMP_EXTN))
+					snprintf(to_filename, sizeof (to_filename),
+					    "%s" COMP_EXTN, pctx->to_filename);
+				else
+					snprintf(to_filename, sizeof (to_filename),
+					    "%s", pctx->to_filename);
 				if ((compfd = open(to_filename, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) == -1) {
 					log_msg(LOG_ERR, 1, "open ");
 					COMP_BAIL;
@@ -3131,8 +3136,7 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
 				}
 			} else {
 				strcpy(apath, pctx->filename);
-				if (!endswith(apath, COMP_EXTN))
-					strcat(apath, COMP_EXTN);
+				strcat(apath, COMP_EXTN);
 				pctx->to_filename = realpath(apath, NULL);
 
 				/* Check if compressed file exists */
diff --git a/utils/phash/extensions.h b/utils/phash/extensions.h
index 4aac8e2..e29394e 100644
--- a/utils/phash/extensions.h
+++ b/utils/phash/extensions.h
@@ -69,11 +69,11 @@ struct ext_entry {
 	{"lua"	, TYPE_TEXT, 3},
 	{"qml"	, TYPE_TEXT|TYPE_MARKUP, 3},
 	{"fa"	, TYPE_TEXT|TYPE_DNA_SEQ, 2},
-	{"faa"	, TYPE_TEXT, 3},
+	{"faa"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
 	{"asn"	, TYPE_TEXT|TYPE_MARKUP, 3},
 	{"ffn"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
 	{"fna"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
-	{"frn"	, TYPE_TEXT, 3},
+	{"frn"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
 	{"gbk"	, TYPE_TEXT, 3},
 	{"gff"	, TYPE_TEXT, 3},
 	{"ptt"	, TYPE_TEXT, 3},
diff --git a/utils/phash/extensions.txt b/utils/phash/extensions.txt
index 5a3642a..b227fb4 100644
--- a/utils/phash/extensions.txt
+++ b/utils/phash/extensions.txt
@@ -58,11 +58,11 @@ qml,TYPE_TEXT|TYPE_MARKUP
 
 # These are all genomic data file extensions
 fa,TYPE_TEXT|TYPE_DNA_SEQ
-faa,TYPE_TEXT
+faa,TYPE_TEXT|TYPE_DNA_SEQ
 asn,TYPE_TEXT|TYPE_MARKUP
 ffn,TYPE_TEXT|TYPE_DNA_SEQ
 fna,TYPE_TEXT|TYPE_DNA_SEQ
-frn,TYPE_TEXT
+frn,TYPE_TEXT|TYPE_DNA_SEQ
 gbk,TYPE_TEXT
 gff,TYPE_TEXT
 ptt,TYPE_TEXT