diff --git a/panda/src/pipeline/lightReMutexDirect.h b/panda/src/pipeline/lightReMutexDirect.h
index d1bc022740..384330587e 100644
--- a/panda/src/pipeline/lightReMutexDirect.h
+++ b/panda/src/pipeline/lightReMutexDirect.h
@@ -17,8 +17,7 @@
 #include "pandabase.h"
 #include "mutexImpl.h"
 #include "reMutexDirect.h"
-
-class Thread;
+#include "thread.h"
 
 #ifndef DEBUG_THREADS
 
diff --git a/panda/src/pipeline/reMutexDirect.h b/panda/src/pipeline/reMutexDirect.h
index faf46d0fb0..9a82b728ba 100644
--- a/panda/src/pipeline/reMutexDirect.h
+++ b/panda/src/pipeline/reMutexDirect.h
@@ -17,8 +17,7 @@
 #include "pandabase.h"
 #include "mutexTrueImpl.h"
 #include "conditionVarImpl.h"
-
-class Thread;
+#include "thread.h"
 
 #ifndef DEBUG_THREADS