diff --git a/src/eval_visualization/eval_visualization_core.c b/src/eval_visualization/eval_visualization_core.c
index b8974c71..272d6e1b 100644
--- a/src/eval_visualization/eval_visualization_core.c
+++ b/src/eval_visualization/eval_visualization_core.c
@@ -39,6 +39,12 @@ EV_VIEW_RULE_EXPR_EXPAND_NUM_FROM_ID_FUNCTION_DEF(identity)
 ////////////////////////////////
 //~ rjf: Key Functions
 
+#if !defined(XXH_IMPLEMENTATION)
+# define XXH_IMPLEMENTATION
+# define XXH_STATIC_LINKING_ONLY
+# include "linker/third_party_ext/xxHash/xxhash.h"
+#endif
+
 internal EV_Key
 ev_key_make(U64 parent_hash, U64 child_id)
 {
@@ -74,11 +80,7 @@ ev_key_match(EV_Key a, EV_Key b)
 internal U64
 ev_hash_from_seed_string(U64 seed, String8 string)
 {
-  U64 result = seed;
-  for(U64 i = 0; i < string.size; i += 1)
-  {
-    result = ((result << 5) + result) + string.str[i];
-  }
+  U64 result = XXH3_64bits_withSeed(string.str, string.size, seed);
   return result;
 }
 
diff --git a/src/ui/ui_core.c b/src/ui/ui_core.c
index 904b22a5..865d6271 100644
--- a/src/ui/ui_core.c
+++ b/src/ui/ui_core.c
@@ -12,14 +12,16 @@ thread_static UI_State *ui_state = 0;
 ////////////////////////////////
 //~ rjf: Basic Type Functions
 
+#if !defined(XXH_IMPLEMENTATION)
+# define XXH_IMPLEMENTATION
+# define XXH_STATIC_LINKING_ONLY
+# include "linker/third_party_ext/xxHash/xxhash.h"
+#endif
+
 internal U64
 ui_hash_from_string(U64 seed, String8 string)
 {
-  U64 result = seed;
-  for(U64 i = 0; i < string.size; i += 1)
-  {
-    result = ((result << 5) + result) + string.str[i];
-  }
+  U64 result = XXH3_64bits_withSeed(string.str, string.size, seed);
   return result;
 }