diff --git a/src/external/nexus/PNeXus.cpp b/src/external/nexus/PNeXus.cpp
index 4336273c..25236e98 100644
--- a/src/external/nexus/PNeXus.cpp
+++ b/src/external/nexus/PNeXus.cpp
@@ -29,6 +29,9 @@
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
 
+#include <cstdio>
+#include <cstring>
+
 #include "PNeXus.h"
 
 #ifndef SIZE_FLOAT32
diff --git a/src/tests/nexus/nexus_read_test.cpp b/src/tests/nexus/nexus_read_test.cpp
index 96a42ea7..951dc499 100644
--- a/src/tests/nexus/nexus_read_test.cpp
+++ b/src/tests/nexus/nexus_read_test.cpp
@@ -30,6 +30,7 @@
  ***************************************************************************/
 
 #include <cstdio>
+#include <cstring>
 
 #include <iostream>
 #include <string>