diff --git a/libc-test/semver/windows.txt b/libc-test/semver/windows.txt
index fa3fb8efecd38..ad0a60d4719cd 100644
--- a/libc-test/semver/windows.txt
+++ b/libc-test/semver/windows.txt
@@ -149,6 +149,7 @@ accept
 access
 aligned_malloc
 aligned_free
+aligned_realloc
 atexit
 atof
 atoi
diff --git a/src/windows/mod.rs b/src/windows/mod.rs
index df4f8047e22ad..3aa810ee68563 100644
--- a/src/windows/mod.rs
+++ b/src/windows/mod.rs
@@ -518,6 +518,9 @@ extern "C" {
     pub fn aligned_malloc(size: size_t, alignment: size_t) -> *mut c_void;
     #[link_name = "_aligned_free"]
     pub fn aligned_free(ptr: *mut ::c_void);
+    #[link_name = "_aligned_realloc"]
+    pub fn aligned_realloc(memblock: *mut ::c_void, size: size_t, alignment: size_t)
+        -> *mut c_void;
     #[link_name = "_putenv"]
     pub fn putenv(envstring: *const ::c_char) -> ::c_int;
     #[link_name = "_wputenv"]