diff --git a/stand/common/metadata.c b/stand/common/metadata.c
--- a/stand/common/metadata.c
+++ b/stand/common/metadata.c
@@ -111,6 +111,7 @@
 
 static int align;
 
+#define MOD_ALIGN(l)	roundup(l, align)
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
@@ -123,7 +124,7 @@
     COPY32(strlen(s) + 1, a, c)			\
     if (c)					\
         archsw.arch_copyin(s, a, strlen(s) + 1);\
-    a += roundup(strlen(s) + 1, align);		\
+    a += MOD_ALIGN(strlen(s) + 1);		\
 }
 
 #define MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -135,7 +136,7 @@
     COPY32(sizeof(s), a, c);			\
     if (c)					\
         archsw.arch_copyin(&s, a, sizeof(s));	\
-    a += roundup(sizeof(s), align);		\
+    a += MOD_ALIGN(sizeof(s));			\
 }
 
 #define MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -146,7 +147,7 @@
     COPY32(mm->md_size, a, c);			\
     if (c)					\
         archsw.arch_copyin(mm->md_data, a, mm->md_size);\
-    a += roundup(mm->md_size, align);		\
+    a += MOD_ALIGN(mm->md_size);		\
 }
 
 #define MOD_END(a, c) {				\
diff --git a/stand/efi/loader/bootinfo.c b/stand/efi/loader/bootinfo.c
--- a/stand/efi/loader/bootinfo.c
+++ b/stand/efi/loader/bootinfo.c
@@ -180,6 +180,7 @@
  * MOD_SIZE	sizeof(size_t)		module size
  * MOD_METADATA	(variable)		type-specific metadata
  */
+#define MOD_ALIGN(l)	roundup(l, sizeof(u_long))
 #define	COPY32(v, a, c) {					\
 	uint32_t x = (v);					\
 	if (c)							\
@@ -192,7 +193,7 @@
 	COPY32(strlen(s) + 1, a, c);				\
 	if (c)							\
 		archsw.arch_copyin(s, a, strlen(s) + 1);	\
-	a += roundup(strlen(s) + 1, sizeof(u_long));		\
+	a += MOD_ALIGN(strlen(s) + 1);				\
 }
 
 #define	MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -204,7 +205,7 @@
 	COPY32(sizeof(s), a, c);				\
 	if (c)							\
 		archsw.arch_copyin(&s, a, sizeof(s));		\
-	a += roundup(sizeof(s), sizeof(u_long));		\
+	a += MOD_ALIGN(sizeof(s));				\
 }
 
 #define	MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -214,8 +215,8 @@
 	COPY32(MODINFO_METADATA | mm->md_type, a, c);		\
 	COPY32(mm->md_size, a, c);				\
 	if (c)							\
-		archsw.arch_copyin(mm->md_data, a, mm->md_size);	\
-	a += roundup(mm->md_size, sizeof(u_long));		\
+		archsw.arch_copyin(mm->md_data, a, mm->md_size); \
+	a += MOD_ALIGN(mm->md_size);				\
 }
 
 #define	MOD_END(a, c) {						\
diff --git a/stand/i386/libi386/bootinfo32.c b/stand/i386/libi386/bootinfo32.c
--- a/stand/i386/libi386/bootinfo32.c
+++ b/stand/i386/libi386/bootinfo32.c
@@ -59,6 +59,7 @@
  * MOD_SIZE	sizeof(size_t)		module size
  * MOD_METADATA	(variable)		type-specific metadata
  */
+#define MOD_ALIGN(l) roundup(l, sizeof(u_long))
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
@@ -71,7 +72,7 @@
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
 	archsw.arch_copyin(s, a, strlen(s) + 1); \
-    a += roundup(strlen(s) + 1, sizeof(u_long));\
+    a += MOD_ALIGN(strlen(s) + 1);		\
 }
 
 #define MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -83,7 +84,7 @@
     COPY32(sizeof(s), a, c);			\
     if (c)					\
 	archsw.arch_copyin(&s, a, sizeof(s));	\
-    a += roundup(sizeof(s), sizeof(u_long));	\
+    a += MOD_ALIGN(sizeof(s));			\
 }
 
 #define MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -94,7 +95,7 @@
     COPY32(mm->md_size, a, c);			\
     if (c)					\
 	archsw.arch_copyin(mm->md_data, a, mm->md_size); \
-    a += roundup(mm->md_size, sizeof(u_long));\
+    a += MOD_ALIGN(mm->md_size);		\
 }
 
 #define MOD_END(a, c) {				\
diff --git a/stand/i386/libi386/bootinfo64.c b/stand/i386/libi386/bootinfo64.c
--- a/stand/i386/libi386/bootinfo64.c
+++ b/stand/i386/libi386/bootinfo64.c
@@ -60,6 +60,7 @@
  * MOD_SIZE	sizeof(size_t)		module size
  * MOD_METADATA	(variable)		type-specific metadata
  */
+#define MOD_ALIGN(l)	roundup(l, sizeof(uint64_t))
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
@@ -72,7 +73,7 @@
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
 	archsw.arch_copyin(s, a, strlen(s) + 1); \
-    a += roundup(strlen(s) + 1, sizeof(uint64_t));\
+    a += MOD_ALIGN(strlen(s) + 1);		\
 }
 
 #define MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -84,7 +85,7 @@
     COPY32(sizeof(s), a, c);			\
     if (c)					\
 	archsw.arch_copyin(&s, a, sizeof(s));	\
-    a += roundup(sizeof(s), sizeof(uint64_t));	\
+    a += MOD_ALIGN(sizeof(s));			\
 }
 
 #define MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -95,7 +96,7 @@
     COPY32(mm->md_size, a, c);			\
     if (c)					\
 	archsw.arch_copyin(mm->md_data, a, mm->md_size); \
-    a += roundup(mm->md_size, sizeof(uint64_t));\
+    a += MOD_ALIGN(mm->md_size);		\
 }
 
 #define MOD_END(a, c) {				\
diff --git a/stand/userboot/userboot/bootinfo32.c b/stand/userboot/userboot/bootinfo32.c
--- a/stand/userboot/userboot/bootinfo32.c
+++ b/stand/userboot/userboot/bootinfo32.c
@@ -58,6 +58,7 @@
  * MOD_SIZE	sizeof(size_t)		module size
  * MOD_METADATA	(variable)		type-specific metadata
  */
+#define MOD_ALIGN(l)	roundup(l, sizeof(uint32_t))
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
@@ -70,7 +71,7 @@
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
         archsw.arch_copyin(s, a, strlen(s) + 1);\
-    a += roundup(strlen(s) + 1, sizeof(uint32_t));\
+    a += MOD_ALIGN(strlen(s) + 1);		\
 }
 
 #define MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -82,7 +83,7 @@
     COPY32(sizeof(s), a, c);			\
     if (c)					\
         archsw.arch_copyin(&s, a, sizeof(s));	\
-    a += roundup(sizeof(s), sizeof(uint32_t));	\
+    a += MOD_ALIGN(sizeof(s));			\
 }
 
 #define MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -93,7 +94,7 @@
     COPY32(mm->md_size, a, c);			\
     if (c)					\
         archsw.arch_copyin(mm->md_data, a, mm->md_size);\
-    a += roundup(mm->md_size, sizeof(uint32_t));\
+    a += MOD_ALIGN(mm->md_size);		\
 }
 
 #define MOD_END(a, c) {				\
diff --git a/stand/userboot/userboot/bootinfo64.c b/stand/userboot/userboot/bootinfo64.c
--- a/stand/userboot/userboot/bootinfo64.c
+++ b/stand/userboot/userboot/bootinfo64.c
@@ -55,6 +55,7 @@
  * MOD_SIZE	sizeof(size_t)		module size
  * MOD_METADATA	(variable)		type-specific metadata
  */
+#define MOD_ALIGN(l)	roundup(l, sizeof(uint64_t))
 #define COPY32(v, a, c) {			\
     uint32_t	x = (v);			\
     if (c)					\
@@ -67,7 +68,7 @@
     COPY32(strlen(s) + 1, a, c);		\
     if (c)					\
         archsw.arch_copyin(s, a, strlen(s) + 1);\
-    a += roundup(strlen(s) + 1, sizeof(uint64_t));\
+    a += MOD_ALIGN(strlen(s) + 1);		\
 }
 
 #define MOD_NAME(a, s, c)	MOD_STR(MODINFO_NAME, a, s, c)
@@ -79,7 +80,7 @@
     COPY32(sizeof(s), a, c);			\
     if (c)					\
         archsw.arch_copyin(&s, a, sizeof(s));	\
-    a += roundup(sizeof(s), sizeof(uint64_t));	\
+    a += MOD_ALIGN(sizeof(s));			\
 }
 
 #define MOD_ADDR(a, s, c)	MOD_VAR(MODINFO_ADDR, a, s, c)
@@ -90,7 +91,7 @@
     COPY32(mm->md_size, a, c);			\
     if (c)					\
         archsw.arch_copyin(mm->md_data, a, mm->md_size);\
-    a += roundup(mm->md_size, sizeof(uint64_t));\
+    a += MOD_ALIGN(mm->md_size);		\
 }
 
 #define MOD_END(a, c) {				\