diff --git a/sys/cddl/dev/dtrace/dtrace_sysctl.c b/sys/cddl/dev/dtrace/dtrace_sysctl.c
index 87fa705e2d96..c1b1c5661ff4 100644
--- a/sys/cddl/dev/dtrace/dtrace_sysctl.c
+++ b/sys/cddl/dev/dtrace/dtrace_sysctl.c
@@ -75,8 +75,9 @@ sysctl_dtrace_providers(SYSCTL_HANDLER_ARGS)
 
 SYSCTL_NODE(_debug, OID_AUTO, dtrace, CTLFLAG_RD, 0, "DTrace debug parameters");
 
-SYSCTL_PROC(_debug_dtrace, OID_AUTO, providers, CTLTYPE_STRING | CTLFLAG_RD,
-    0, 0, sysctl_dtrace_providers, "A", "available DTrace providers");
+SYSCTL_PROC(_debug_dtrace, OID_AUTO, providers,
+    CTLTYPE_STRING | CTLFLAG_MPSAFE | CTLFLAG_RD, 0, 0, sysctl_dtrace_providers,
+    "A", "available DTrace providers");
 
 SYSCTL_NODE(_kern, OID_AUTO, dtrace, CTLFLAG_RD, 0, "DTrace parameters");
 
diff --git a/sys/cddl/dev/dtrace/dtrace_test.c b/sys/cddl/dev/dtrace/dtrace_test.c
index 9caf2f00f32c..941f5d94b48b 100644
--- a/sys/cddl/dev/dtrace/dtrace_test.c
+++ b/sys/cddl/dev/dtrace/dtrace_test.c
@@ -77,8 +77,9 @@ dtrace_test_sdttest(SYSCTL_HANDLER_ARGS)
 
 static SYSCTL_NODE(_debug, OID_AUTO, dtracetest, CTLFLAG_RD, 0, "");
 
-SYSCTL_PROC(_debug_dtracetest, OID_AUTO, sdttest, CTLTYPE_INT | CTLFLAG_RW,
-    NULL, 0, dtrace_test_sdttest, "I", "Trigger the SDT test probe");
+SYSCTL_PROC(_debug_dtracetest, OID_AUTO, sdttest,
+    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, dtrace_test_sdttest,
+    "I", "Trigger the SDT test probe");
 
 static int
 dtrace_test_modevent(module_t mod, int type, void *data)