diff --git a/modules/src/read_em/em_comp.h b/modules/src/read_em/em_comp.h
index 0d946c96c..fea23e0f5 100644
--- a/modules/src/read_em/em_comp.h
+++ b/modules/src/read_em/em_comp.h
@@ -62,3 +62,4 @@ struct e_args {
 extern char *EM_error;
 extern unsigned int EM_lineno;
 extern char *EM_filename;
+extern int EM_wordsize, EM_pointersize;