diff --git a/dtool/src/parser-inc/synchapi.h b/dtool/src/parser-inc/synchapi.h
new file mode 100755
index 0000000000..3332ebd6e7
--- /dev/null
+++ b/dtool/src/parser-inc/synchapi.h
@@ -0,0 +1,10 @@
+#ifndef SYNCHAPI_H
+#define SYNCHAPI_H
+
+#include "winnt.h"
+
+#define SRWLOCK_INIT RTL_SRWLOCK_INIT
+
+typedef RTL_SRWLOCK SRWLOCK, *PSRWLOCK;
+
+#endif
diff --git a/dtool/src/parser-inc/winnt.h b/dtool/src/parser-inc/winnt.h
new file mode 100755
index 0000000000..0984c7312f
--- /dev/null
+++ b/dtool/src/parser-inc/winnt.h
@@ -0,0 +1,16 @@
+#ifndef WINNT_H
+#define WINNT_H
+
+typedef void *PVOID;
+
+typedef struct _RTL_SRWLOCK {
+  PVOID Ptr;
+} RTL_SRWLOCK, *PRTL_SRWLOCK;
+
+#define RTL_SRWLOCK_INIT {0}
+
+typedef struct _RTL_CONDITION_VARIABLE {
+  PVOID Ptr;
+} RTL_CONDITION_VARIABLE, *PRTL_CONDITION_VARIABLE;
+
+#endif