diff --git a/stand/common/modinfo.c b/stand/common/modinfo.c
--- a/stand/common/modinfo.c
+++ b/stand/common/modinfo.c
@@ -114,6 +114,8 @@
 const char md_modtype_obj[] = MODTYPE_OBJ;
 const char md_kerntype_mb[] = KERNTYPE_MB;
 
+static vm_offset_t mod_align_size;
+
 vm_offset_t
 md_copymodules(vm_offset_t addr, bool kern64)
 {
@@ -195,6 +197,51 @@
 	return(last);
 }
 
+static int
+md_set_mod_align_size(struct env_var *ev, int flags, const void *value)
+{
+	long v;
+	char *ep;
+
+	/*
+	 * Must be at least as large as PAGE_SIZE, but no more than 32k times
+	 * that (4k to 32MB on x86) and a power of 2. This should be more than
+	 * adequate.
+	 */
+	v = strtol(value, &ep, 0);
+	if (v < PAGE_SIZE || v > PAGE_SIZE * 32768 || (v & (v - 1)) != 0) {
+		printf("bad value %s for mod_align_size\n", (const char *)value);
+		return (-1);
+	}
+
+	/*
+	 * First time through we set it as EV_DYNAMIC to the string
+	 * representation of the page size. So now we just replace that string
+	 * with the new value we set, converted to decimal.
+	 */
+	// assert(ev->ev_flags & EV_DYNAMIC);
+	free(ev->ev_value);
+	asprintf(&ep, "%ld", v);
+	ev->ev_value = ep;
+
+	return (0);
+}
+
+/*
+ * Initialize the module subsystem. It's optional, but to override the
+ * mod_align_size, it has to be called before we load the kernel, the first
+ * use of md_align.
+ */
+static void
+md_init(void)
+{
+	char *value;
+
+	asprintf(&value, "%d", (int)PAGE_SIZE);
+	env_setenv("mod_align_size", EV_DYNAMIC, value, md_set_mod_align_size,
+	    env_nounset);
+}
+
 /*
  * Take the ending address and round it up to the currently required
  * alignment. This typically is the page size, but is the larger of the compiled
@@ -211,5 +258,8 @@
 vm_offset_t
 md_align(vm_offset_t addr)
 {
-	return (roundup(addr, PAGE_SIZE));
+	if (mod_align_size == 0)
+		md_init();
+
+	return (roundup(addr, mod_align_size));
 }