diff --git a/arch/arm/src/common/up_internal.h b/arch/arm/src/common/up_internal.h
index 862ceb82c6..a12fd1001d 100644
--- a/arch/arm/src/common/up_internal.h
+++ b/arch/arm/src/common/up_internal.h
@@ -200,6 +200,7 @@ extern void up_netinitialize(void);
 extern void up_usbinitialize(void);
 extern void up_usbuninitialize(void);
 #else
+# define up_usbinitialize()
 # define up_netinitialize()
 #endif