diff --git a/src/common/dynlib.cpp b/src/common/dynlib.cpp
index 39c53cd2ee..5976df793d 100644
--- a/src/common/dynlib.cpp
+++ b/src/common/dynlib.cpp
@@ -53,9 +53,12 @@
     // note about dlopen() flags: we use RTLD_NOW to have more Windows-like
     // behaviour (Win won't let you load a library with missing symbols) and
     // RTLD_GLOBAL because it is needed sometimes and probably doesn't hurt
-    // otherwise. On VMS the second argument on dlopen is ignored.
+    // otherwise. On True64-Unix RTLD_GLOBAL is not allowed and on VMS the
+    // second argument on dlopen is ignored.
 #ifdef __VMS
 # define wxDllOpen(lib)                dlopen(lib.fn_str(), 0 )
+#elif defined( __osf__ )
+# define wxDllOpen(lib)                dlopen(lib.fn_str(), RTLD_LAZY )
 #else
 # define wxDllOpen(lib)                dlopen(lib.fn_str(), RTLD_LAZY | RTLD_GLOBAL)
 #endif