diff --git a/lib/libcasper/libcasper/libcasper.c b/lib/libcasper/libcasper/libcasper.c
index 9cc008cdb7bc..8783529d9dc0 100644
--- a/lib/libcasper/libcasper/libcasper.c
+++ b/lib/libcasper/libcasper/libcasper.c
@@ -95,7 +95,7 @@ cap_init(void)
 		return (NULL);
 	}
 
-	pid = pdfork(&pfd, 0);
+	pid = pdfork(&pfd, PD_NOWAITPID);
 	if (pid == 0) {
 		/* Child. */
 		close(sock[0]);
diff --git a/lib/libcasper/libcasper/zygote.c b/lib/libcasper/libcasper/zygote.c
index 976e391d8dcb..8295312b6593 100644
--- a/lib/libcasper/libcasper/zygote.c
+++ b/lib/libcasper/libcasper/zygote.c
@@ -149,7 +149,7 @@ zygote_main(int *sockp)
 			error = errno;
 			goto send;
 		}
-		pid = pdfork(&procfd, 0);
+		pid = pdfork(&procfd, PD_NOWAITPID);
 		switch (pid) {
 		case -1:
 			/* Failure. */