diff --git a/opal/datatype/opal_datatype_cuda.c b/opal/datatype/opal_datatype_cuda.c
index dbca5d815a..3d51a2201d 100644
--- a/opal/datatype/opal_datatype_cuda.c
+++ b/opal/datatype/opal_datatype_cuda.c
@@ -10,6 +10,7 @@
 #include "opal_config.h"
 
 #include <errno.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "opal/align.h"