diff --git a/litex/soc/software/include/base/stdint.h b/litex/soc/software/include/base/stdint.h
index 90332e394..6b81cd1b7 100644
--- a/litex/soc/software/include/base/stdint.h
+++ b/litex/soc/software/include/base/stdint.h
@@ -18,6 +18,15 @@ typedef int int32_t;
 typedef short int16_t;
 typedef char int8_t;
 
+typedef char int_least8_t;
+typedef unsigned char uint_least8_t;
+typedef short int_least16_t;
+typedef unsigned short uint_least16_t;
+typedef int int_least32_t;
+typedef unsigned int uint_least32_t;
+typedef long long int_least64_t;
+typedef unsigned long long uint_least64_t;
+  
 #define __int_c_join(a, b) a ## b
 #define __int_c(v, suffix) __int_c_join(v, suffix)
 #define __uint_c(v, suffix) __int_c_join(v##U, suffix)