diff --git a/src/npc.c b/src/npc.c
index ca16171..5b6c5c9 100644
--- a/src/npc.c
+++ b/src/npc.c
@@ -22,11 +22,6 @@
 #include <sysexits.h> /* EX_IOERR, EX_OK, EX_OSERR, EX_USAGE */
 #include <unistd.h> /* pledge(2), getopt(3) */
 
-#ifdef __OpenBSD__
-#	include <errno.h> /* errno */
-#	include <string.h> /* strerror(3) */
-#endif
-
 char *program_name = "npc";
 
 static int
@@ -48,7 +43,7 @@ int main(int argc, char *argv[]) {
 	program_name = argv[0] == NULL ? program_name : argv[0];
 
 	if (pledge("stdio", NULL) == -1) {
-		(void)fprintf(stderr, "%s: %s\n", program_name, strerror(errno));
+		perror(program_name);
 		return EX_OSERR;
 	}
 #endif