diff --git a/compat/mimalloc/alloc.c b/compat/mimalloc/alloc.c
index 961f6d53d0f2c7..ae272c1fb54504 100644
--- a/compat/mimalloc/alloc.c
+++ b/compat/mimalloc/alloc.c
@@ -16,10 +16,6 @@ terms of the MIT license. A copy of the license can be found in the file
 #include <string.h>      // memset, strlen (for mi_strdup)
 #include <stdlib.h>      // malloc, abort
 
-#define MI_IN_ALLOC_C
-#include "alloc-override.c"
-#undef MI_IN_ALLOC_C
-
 // ------------------------------------------------------
 // Allocation
 // ------------------------------------------------------
diff --git a/compat/mimalloc/mimalloc.h b/compat/mimalloc/mimalloc.h
index c0f5e96e51e975..7e3b5dd66e91a0 100644
--- a/compat/mimalloc/mimalloc.h
+++ b/compat/mimalloc/mimalloc.h
@@ -95,7 +95,8 @@ terms of the MIT license. A copy of the license can be found in the file
 // Includes
 // ------------------------------------------------------
 
-#include <stddef.h>     // size_t
+#include "git-compat-util.h"
+
 #include <stdbool.h>    // bool
 #include <stdint.h>     // INTPTR_MAX