diff --git a/openbsc/src/libbsc/abis_nm.c b/openbsc/src/libbsc/abis_nm.c
index c9b2aaca4..0c723e83d 100644
--- a/openbsc/src/libbsc/abis_nm.c
+++ b/openbsc/src/libbsc/abis_nm.c
@@ -838,7 +838,9 @@ static int is_last_line(FILE *stream)
 		return 1;
 
 	if (!fgets(next_seg_buf, sizeof(next_seg_buf)-2, stream)) {
-		fseek(stream, pos, SEEK_SET);
+		int rc = fseek(stream, pos, SEEK_SET);
+		if (rc < 0)
+			return rc;
 		return 1;
 	}