diff --git a/src/include/vsprintf.h b/src/include/vsprintf.h
index d5018d7c..bba9b9df 100644
--- a/src/include/vsprintf.h
+++ b/src/include/vsprintf.h
@@ -31,6 +31,7 @@
  *
  */
 
+#include <stdint.h>
 #include <stdarg.h>
 
 #define PRINTF_NO_LENGTH ( ( size_t ) -1 )