diff --git a/changes/bug30614 b/changes/bug30614
new file mode 100644
index 0000000000..9f904bd115
--- /dev/null
+++ b/changes/bug30614
@@ -0,0 +1,4 @@
+  o Minor bugfixes (NetBSD):
+    - Fix usage of minherit() on NetBSD and other platforms that define
+      MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
+      30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
diff --git a/src/lib/malloc/map_anon.c b/src/lib/malloc/map_anon.c
index f4fda00bff..e2c41ab9c3 100644
--- a/src/lib/malloc/map_anon.c
+++ b/src/lib/malloc/map_anon.c
@@ -50,11 +50,15 @@
 
 #ifdef INHERIT_ZERO
 #define FLAG_ZERO INHERIT_ZERO
+#elif defined(MAP_INHERIT_ZERO)
+#define FLAG_ZERO MAP_INHERIT_ZERO
 #endif
 #ifdef INHERIT_NONE
 #define FLAG_NOINHERIT INHERIT_NONE
 #elif defined(VM_INHERIT_NONE)
 #define FLAG_NOINHERIT VM_INHERIT_NONE
+#elif defined(MAP_INHERIT_NONE)
+#define FLAG_NOINHERIT MAP_INHERIT_NONE
 #endif
 
 #elif defined(HAVE_MADVISE)