diff --git a/src/str.c b/src/str.c
index 9ed27c2..834d607 100644
--- a/src/str.c
+++ b/src/str.c
@@ -25,7 +25,7 @@
 #include <sysexits.h> /* EX_OSERR, EX_USAGE */
 
 #ifdef __OpenBSD__
-#	include <unistd.h> /* pledge(2) */
+#	include <unistd.h> /* pledge(2), unveil(2) */
 #endif
 
 char *program_name = "str";
@@ -62,7 +62,7 @@ int main(int argc, char *argv[]) {
 	program_name = argv[0] == NULL ? program_name : argv[0];
 
 #ifdef __OpenBSD__
-	if (pledge("stdio", NULL) == -1) {
+	if (pledge("stdio unveil", NULL) == -1 || unveil(NULL, NULL) == -1) {
 		perror(program_name);
 		return EX_OSERR;
 	}