diff --git a/panda/src/express/hashVal.cxx b/panda/src/express/hashVal.cxx
index 8927b23243..1560decd75 100644
--- a/panda/src/express/hashVal.cxx
+++ b/panda/src/express/hashVal.cxx
@@ -14,10 +14,12 @@
 
 #include "hashVal.h"
 #include "virtualFileSystem.h"
-#include "openSSLWrapper.h"  // must be included before any other openssl.
-#include "openssl/md5.h"
 #include <ctype.h>
 
+#ifdef HAVE_OPENSSL
+#include "openSSLWrapper.h"  // must be included before any other openssl.
+#include "openssl/md5.h"
+#endif  // HAVE_OPENSSL
 
 
 ////////////////////////////////////////////////////////////////////