diff --git a/reactos/sdk/tools/isohybrid/isohybrid.c b/reactos/sdk/tools/isohybrid/isohybrid.c
index 12e4a2cbfdb..dd78c79a4fa 100644
--- a/reactos/sdk/tools/isohybrid/isohybrid.c
+++ b/reactos/sdk/tools/isohybrid/isohybrid.c
@@ -36,7 +36,7 @@
 #include <string.h>
 //#include <unistd.h>
 #include <sys/stat.h>
-#include <inttypes.h>
+//#include <inttypes.h>
 #ifdef REACTOS_ISOHYBRID_EFI_MAC_SUPPORT
 #include <uuid/uuid.h>
 #endif
diff --git a/reactos/sdk/tools/isohybrid/reactos_support_code.h b/reactos/sdk/tools/isohybrid/reactos_support_code.h
index 8c7cfd0a3e3..3f3344c4e02 100644
--- a/reactos/sdk/tools/isohybrid/reactos_support_code.h
+++ b/reactos/sdk/tools/isohybrid/reactos_support_code.h
@@ -14,6 +14,12 @@
 #include <unistd.h>
 #endif
 
+// isotypes.h would provide these, but it's not available on MSVC < 2013.
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+typedef unsigned int uint32_t;
+typedef unsigned long long uint64_t;
+
 void isohybrid_error(int eval, const char* fmt, ...);
 void isohybrid_warning(const char* fmt, ...);