diff --git a/crypto/capi_util.cc b/crypto/capi_util.cc
index 7593f39..2cf1062 100644
--- a/crypto/capi_util.cc
+++ b/crypto/capi_util.cc
@@ -46,4 +46,12 @@
   return CryptAcquireContext(prov, container, provider, prov_type, flags);
 }
 
+void* WINAPI CryptAlloc(size_t size) {
+  return malloc(size);
+}
+
+void WINAPI CryptFree(void* p) {
+  free(p);
+}
+
 }  // namespace crypto