diff --git a/qpms/ewaldsf.c b/qpms/ewaldsf.c
index c2ac92d..1688287 100644
--- a/qpms/ewaldsf.c
+++ b/qpms/ewaldsf.c
@@ -14,6 +14,7 @@
 #include <stdbool.h>
 #include <Faddeeva.h>
 #include "tiny_inlines.h"
+#include "qpms_error.h"
 
 // Some magic constants