diff --git a/codec2-1.2.0/src/codec2_alloc.cpp b/codec2-1.2.0/src/codec2_alloc.cpp
index 733f27b4..052e7f06 100644
--- a/codec2-1.2.0/src/codec2_alloc.cpp
+++ b/codec2-1.2.0/src/codec2_alloc.cpp
@@ -14,6 +14,7 @@ extern "C" {
 #include <unistd.h>
 #else
 #include <memoryapi.h>
+#include <sysinfoapi.h>
 #endif // !defined(WIN32)
 
 static thread_local void* Heap_ = NULL;