diff --git a/src/core/vsprintf.c b/src/core/vsprintf.c
index ca22ae88..e6f072e7 100644
--- a/src/core/vsprintf.c
+++ b/src/core/vsprintf.c
@@ -21,7 +21,7 @@
 #include <stdio.h>
 #include <console.h>
 #include <errno.h>
-#include <vsprintf.h>
+#include <gpxe/vsprintf.h>
 
 /** @file */
 
diff --git a/src/hci/mucurses/print.c b/src/hci/mucurses/print.c
index 80766bc9..9fca3088 100644
--- a/src/hci/mucurses/print.c
+++ b/src/hci/mucurses/print.c
@@ -1,7 +1,7 @@
 #include <curses.h>
 #include <stdio.h>
 #include <stddef.h>
-#include <vsprintf.h>
+#include <gpxe/vsprintf.h>
 #include "mucurses.h"
 
 /** @file
diff --git a/src/include/vsprintf.h b/src/include/gpxe/vsprintf.h
similarity index 95%
rename from src/include/vsprintf.h
rename to src/include/gpxe/vsprintf.h
index 313605bb..ac87c5a8 100644
--- a/src/include/vsprintf.h
+++ b/src/include/gpxe/vsprintf.h
@@ -1,5 +1,5 @@
-#ifndef VSPRINTF_H
-#define VSPRINTF_H
+#ifndef _GPXE_VSPRINTF_H
+#define _GPXE_VSPRINTF_H
 
 /** @file
  *
@@ -64,4 +64,4 @@ struct printf_context {
 
 extern size_t vcprintf ( struct printf_context *ctx, const char *fmt,
 			 va_list args );
-#endif /* VSPRINTF_H */
+#endif /* _GPXE_VSPRINTF_H */