1 files changed, 5 insertions, 3 deletions
diff --git a/src/H5private.h b/src/H5private.h
index f0f3687..2f5a727 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -1897,12 +1897,14 @@ H5_DLL double H5_trace(const double *calltime, const char *func, const char *typ
 /* global library version information string */
 extern char  H5_lib_vers_info_g[];
 
+/* Include required thread-safety header, always, for the H5TS_thread_id()
+ * definition.
+ */
+#include "H5TSprivate.h"
+
 /* Lock headers */
 #ifdef H5_HAVE_THREADSAFE
 
-/* Include required thread-safety header */
-#include "H5TSprivate.h"
-
 /* replacement structure for original global variable */
 typedef struct H5_api_struct {
     H5TS_mutex_t init_lock;  /* API entrance mutex */