diff --git a/flang-rt/lib/runtime/descriptor.cpp b/flang-rt/lib/runtime/descriptor.cpp
index e4b5bd2e74db..45191bfbe3ad 100644
--- a/flang-rt/lib/runtime/descriptor.cpp
+++ b/flang-rt/lib/runtime/descriptor.cpp
@@ -27,7 +27,7 @@ RT_OFFLOAD_API_GROUP_BEGIN
 RT_API_ATTRS Descriptor::Descriptor(const Descriptor &that) { *this = that; }
 
 RT_API_ATTRS Descriptor &Descriptor::operator=(const Descriptor &that) {
-  runtime::memcpy(this, &that, that.SizeInBytes());
+  runtime::memcpy(reinterpret_cast<void *>(this), &that, that.SizeInBytes());
   return *this;
 }