diff --git a/include/dragonbox/dragonbox.h b/include/dragonbox/dragonbox.h
index 543857e..2e46d3c 100644
--- a/include/dragonbox/dragonbox.h
+++ b/include/dragonbox/dragonbox.h
@@ -880,7 +880,7 @@ namespace jkj::dragonbox {
             static constexpr int cache_bits = 64;
             static constexpr int min_k = -31;
             static constexpr int max_k = 46;
-            static constexpr cache_entry_type cache[] = {
+            static constexpr cache_entry_type cache[max_k - min_k + 1] = {
                 0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f, 0xfd87b5f28300ca0e,
                 0x9e74d1b791e07e49, 0xc612062576589ddb, 0xf79687aed3eec552, 0x9abe14cd44753b53,
                 0xc16d9a0095928a28, 0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
@@ -914,7 +914,7 @@ namespace jkj::dragonbox {
             static constexpr int cache_bits = 128;
             static constexpr int min_k = -292;
             static constexpr int max_k = 326;
-            static constexpr cache_entry_type cache[] = {
+            static constexpr cache_entry_type cache[max_k - min_k + 1] = {
                 {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b}, {0x9faacf3df73609b1, 0x77b191618c54e9ad},
                 {0xc795830d75038c1d, 0xd59df5b9ef6a2418}, {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
                 {0x9becce62836ac577, 0x4ee367f9430aec33}, {0xc2e801fb244576d5, 0x229c41f793cda740},