diff --git a/include/msvc_compat/windows_extra.h b/include/msvc_compat/windows_extra.h
index 0c5e323f..114f43b1 100644
--- a/include/msvc_compat/windows_extra.h
+++ b/include/msvc_compat/windows_extra.h
@@ -23,4 +23,6 @@
 #  define ERANGE ERROR_INVALID_DATA
 #endif
 
+#define getpid() GetCurrentProcessId()
+
 #endif /* MSVC_COMPAT_WINDOWS_EXTRA_H */
diff --git a/src/prof.c b/src/prof.c
index 31f5e601..3abb38e2 100644
--- a/src/prof.c
+++ b/src/prof.c
@@ -1384,6 +1384,8 @@ prof_dump_maps(bool propagate_err)
 	cassert(config_prof);
 #ifdef __FreeBSD__
 	mfd = prof_open_maps("/proc/curproc/map");
+#elif defined(_WIN32)
+	mfd = -1; // Not implemented
 #else
 	{
 		int pid = getpid();