diff --git a/build/tools/makegcdfirm/misc.h b/build/tools/makegcdfirm/misc.h
index 2e0fe765..5c771fdb 100644
--- a/build/tools/makegcdfirm/misc.h
+++ b/build/tools/makegcdfirm/misc.h
@@ -33,6 +33,7 @@ typedef signed char s8;
 typedef signed short int s16;
 typedef signed long int s32;
 typedef signed long long s64;
+typedef volatile u8 vu8;
 typedef volatile u32 vu32;
 typedef vu32 REGType32v;
 
diff --git a/build/tools/makenandfirm/misc.h b/build/tools/makenandfirm/misc.h
index 13cd6789..215402ed 100644
--- a/build/tools/makenandfirm/misc.h
+++ b/build/tools/makenandfirm/misc.h
@@ -33,6 +33,7 @@ typedef signed char s8;
 typedef signed short int s16;
 typedef signed long int s32;
 typedef signed long long s64;
+typedef volatile u8 vu8;
 typedef volatile u32 vu32;
 typedef vu32 REGType32v;
 
diff --git a/build/tools/makenorfirm/misc.h b/build/tools/makenorfirm/misc.h
index 61efe947..8255b39e 100644
--- a/build/tools/makenorfirm/misc.h
+++ b/build/tools/makenorfirm/misc.h
@@ -33,9 +33,13 @@ typedef signed char s8;
 typedef signed short int s16;
 typedef signed long int s32;
 typedef signed long long s64;
+typedef volatile u8 vu8;
 typedef volatile u32 vu32;
 typedef vu32 REGType32v;
 
+
+
+
 #define error(...)  do { fprintf(stderr, "Error: ");   \
                              fprintf(stderr, __VA_ARGS__); \
                              fprintf(stderr, "\n"); } while(0)