diff --git a/src/xenia/kernel/modules/xboxkrnl/xboxkrnl_rtl.cc b/src/xenia/kernel/modules/xboxkrnl/xboxkrnl_rtl.cc
index 8769c4348..d4b607a07 100644
--- a/src/xenia/kernel/modules/xboxkrnl/xboxkrnl_rtl.cc
+++ b/src/xenia/kernel/modules/xboxkrnl/xboxkrnl_rtl.cc
@@ -441,7 +441,7 @@ SHIM_CALL _vsnprintf_shim(
     }
 
     // get length
-    int arg_size = 0;
+    int arg_size = 4;
 
     if (*end == 'h') {
       ++end;
@@ -529,7 +529,7 @@ SHIM_CALL _vsnprintf_shim(
       local[0] = '\0';
       strncat(local, start, end + 1 - start);
 
-      XEASSERT(arg_size == 0);
+      XEASSERT(arg_size == 4);
       if (arg_extras == 0) {
         uint32_t value = (uint32_t)SHIM_MEM_64(arg_ptr + (arg_index * 8)); // TODO: check if this is correct...
         const char *pointer = (const char *)SHIM_MEM_ADDR(value);