diff --git a/share/man/man4/pcm.4 b/share/man/man4/pcm.4
index 8a92cefa354..4e70d95d544 100644
--- a/share/man/man4/pcm.4
+++ b/share/man/man4/pcm.4
@@ -267,7 +267,7 @@ call, which
 .Fx
 does not.
 .Pp
-The following values are supported (default is 0):
+The following values are supported (default is -1):
 .Bl -tag -width 2n
 .It -1
 Force-disable PROT_EXEC
diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index d9726ffdd6b..7b4f3f15645 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -55,7 +55,7 @@ struct dsp_cdevpriv {
 };
 
 #ifdef SV_ABI_LINUX
-static int dsp_mmap_allow_prot_exec = 0;
+static int dsp_mmap_allow_prot_exec = -1;
 SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RWTUN,
     &dsp_mmap_allow_prot_exec, 0,
     "linux mmap compatibility (-1=force-disable 0=auto)");