diff --git a/src/frontend/inpcom.c b/src/frontend/inpcom.c
index 595154864..1c5df41ed 100644
--- a/src/frontend/inpcom.c
+++ b/src/frontend/inpcom.c
@@ -7933,6 +7933,9 @@ static void inp_meas_current(struct card *deck)
             if (*curr_line == '*')
                 continue;
 
+            if (*curr_line == '\0')
+                continue;
+
             if (*curr_line == '.') {
                 if (ciprefix(".subckt", curr_line))
                     subs++;