diff --git a/field_multiplier.c b/field_multiplier.c
index fca83f8..6d0a38e 100644
--- a/field_multiplier.c
+++ b/field_multiplier.c
@@ -3,7 +3,11 @@
 #include "field_multiplier.h"
 #include "card.h"
 
-const FieldMultiplier *calculate_field_multiplier(Hand *h) {
+static FieldMultiplier small_field = { "Small Field", 1 };
+static FieldMultiplier large_field = { "Large Field", 2 };
+static FieldMultiplier grand_field = { "Grand Field", 4 };
+
+FieldMultiplier *calculate_field_multiplier(Hand *h) {
   bool large = false;
   for (int i = 0; i < h->count; i++) {
     Card *c = h->cards[i];
diff --git a/field_multiplier.h b/field_multiplier.h
index 8b3e1f3..c9ea8a2 100644
--- a/field_multiplier.h
+++ b/field_multiplier.h
@@ -10,10 +10,6 @@ struct FieldMultiplier {
   int value;
 };
 
-static const FieldMultiplier small_field = { "Small Field", 1 };
-static const FieldMultiplier large_field = { "Large Field", 2 };
-static const FieldMultiplier grand_field = { "Grand Field", 4 };
-
-const FieldMultiplier *calculate_field_multiplier(Hand *h);
+FieldMultiplier *calculate_field_multiplier(Hand *h);
 
 #endif