diff --git a/source/md.c b/source/md.c
index eb651f1..8dd2c76 100644
--- a/source/md.c
+++ b/source/md.c
@@ -597,9 +597,9 @@ MD_GetScratchDefault(MD_Arena **conflicts, MD_u64 count){
 
 #define MD_UNTERMINATED_TOKEN_LEN_CAP 20
 
-#if !defined(MD_NO_STB_SPRINTF)
-#define MD_STB_SPRINTF_IMPLEMENTATION
-#define MD_STB_SPRINTF_DECORATE(name) md_stbsp_##name
+#if MD_DEFAULT_SPRINTF
+#define STB_SPRINTF_IMPLEMENTATION
+#define STB_SPRINTF_DECORATE(name) md_stbsp_##name
 #include "md_stb_sprintf.h"
 #endif
 
@@ -908,11 +908,11 @@ MD_S8FmtV(MD_Arena *arena, char *fmt, va_list args)
     MD_String8 result = MD_ZERO_STRUCT;
     va_list args2;
     va_copy(args2, args);
-    MD_u64 needed_bytes = md_stbsp_vsnprintf(0, 0, fmt, args)+1;
+    MD_u64 needed_bytes = MD_IMPL_Vsnprintf(0, 0, fmt, args)+1;
     result.str = MD_PushArray(arena, MD_u8, needed_bytes);
     result.size = needed_bytes - 1;
     result.str[needed_bytes-1] = 0;
-    md_stbsp_vsnprintf((char*)result.str, needed_bytes, fmt, args2);
+    MD_IMPL_Vsnprintf((char*)result.str, needed_bytes, fmt, args2);
     return result;
 }
 
diff --git a/source/md.h b/source/md.h
index 6fdc724..7199fb1 100644
--- a/source/md.h
+++ b/source/md.h
@@ -43,6 +43,9 @@
 **  "scratch constants" ** OPTIONAL (required for default scratch)
 **   #define MD_IMPL_ScratchCount       MD_u64 / default 2
 **
+**  "sprintf" ** OPTIONAL (default implementation available)
+**   #define MD_IMPL_Vsnprintf          (char * buf, int count, char const * fmt, va_list va) -> int
+**
 ** Default Implementation Controls
 **  These controls default to '1' i.e. 'enabled'
 **   #define MD_DEFAULT_MEMSET    -> construct "memset" from CRT
@@ -50,6 +53,7 @@
 **   #define MD_DEFAULT_MEMORY    -> construct "low level memory" from OS headers
 **   #define MD_DEFAULT_ARENA     -> construct "arena" from "low level memory"
 **   #define MD_DEFAULT_SCRATCH   -> construct "scratch" from "arena"
+**   #define MD_DEFAULT_SPRINTF   -> construct "vsnprintf" from internal implementaion
 **
 */
 
@@ -72,6 +76,9 @@
 #if !defined(MD_DEFAULT_SCRATCH)
 # define MD_DEFAULT_SCRATCH 1
 #endif
+#if !defined(MD_DEFAULT_SPRINTF)
+# define MD_DEFAULT_SPRINTF 1
+#endif
 
 #if !defined(MD_ENABLE_PRINT_HELPERS)
 # define MD_ENABLE_PRINT_HELPERS 0
@@ -384,8 +391,9 @@
 #define MD_MemoryCopy(d,s,z)   (MD_IMPL_Memmove(d,s,z))
 
 //~ sprintf
-#if !defined(MD_NO_STB_SPRINTF)
+#if MD_DEFAULT_SPRINTF
 #define STB_SPRINTF_DECORATE(name) md_stbsp_##name
+#define MD_IMPL_Vsnprintf md_stbsp_vsnprintf
 #include "md_stb_sprintf.h"
 #endif