diff --git a/src/USER-EWALDN/ewald_n.h b/src/USER-EWALDN/ewald_n.h
index c716664a3c..235a39d49f 100644
--- a/src/USER-EWALDN/ewald_n.h
+++ b/src/USER-EWALDN/ewald_n.h
@@ -17,13 +17,13 @@
 #include "kspace.h"
 #include "math_complex.h"
 
+namespace LAMMPS_NS {
+
 #define EWALD_NORDER	6
 #define EWALD_NFUNCS	4
 #define EWALD_MAX_NSUMS	10
 #define EWALD_NSUMS	{1, 1, 7, 1}
 
-namespace LAMMPS_NS {
-
 typedef struct cvector { complex x, y, z; } cvector;
 typedef struct hvector { double x, y, z; } hvector;
 typedef struct kvector { long x, y, z; } kvector;