diff --git a/src/frontend/inpcom.c b/src/frontend/inpcom.c
index f1b37406d..11161e781 100644
--- a/src/frontend/inpcom.c
+++ b/src/frontend/inpcom.c
@@ -9481,6 +9481,10 @@ static void inp_poly_2g6_compat(struct card* deck) {
         case 'e':
             curr_line = nexttok(curr_line);
             curr_line = nexttok(curr_line);
+            if (!curr_line) {
+                fprintf(stderr, "Error: not enough parameters in line\n   %s\n", thisline);
+                controlled_exit(1);
+            }
             /* The next token may be a simple text token or an expression
                enclosed in brackets */
             if (*curr_line == '{') {
@@ -9499,6 +9503,10 @@ static void inp_poly_2g6_compat(struct card* deck) {
         case 'f':
         case 'h':
             curr_line = nexttok(curr_line);
+            if (!curr_line) {
+                fprintf(stderr, "Error: not enough parameters in line\n   %s\n", thisline);
+                controlled_exit(1);
+            }
             /* The next token may be a simple text token or an expression
                enclosed in brackets */
             if (*curr_line == '{') {