diff --git a/data/core/commands/doc.lua b/data/core/commands/doc.lua
index a571b1bb..7787054c 100644
--- a/data/core/commands/doc.lua
+++ b/data/core/commands/doc.lua
@@ -53,18 +53,6 @@ local function save(filename)
   core.log("Saved \"%s\"", saved_filename)
 end
 
-
-local function split_cursor(direction)
-  local new_cursors = {}
-  for _, line1, col1 in doc():get_selections() do
-    if line1 > 1 and line1 < #doc().lines then
-      table.insert(new_cursors, { line1 + direction, col1 })
-    end
-  end
-  for i,v in ipairs(new_cursors) do doc():add_selection(v[1], v[2]) end
-  core.blink_reset()
-end
-
 local function cut_or_copy(delete)
   local full_text = ""
   for idx, line1, col1, line2, col2 in doc():get_selections() do
@@ -79,12 +67,21 @@ local function cut_or_copy(delete)
       doc().cursor_clipboard[idx] = ""
     end
   end
-  if #doc().cursor_clipboard > 1 then 
-    doc().cursor_clipboard["hash"] = system.hash(full_text)
-  end
+  doc().cursor_clipboard["full"] = full_text
   system.set_clipboard(full_text)
 end
 
+local function split_cursor(direction)
+  local new_cursors = {}
+  for _, line1, col1 in doc():get_selections() do
+    if line1 > 1 and line1 < #doc().lines then
+      table.insert(new_cursors, { line1 + direction, col1 })
+    end
+  end
+  for i,v in ipairs(new_cursors) do doc():add_selection(v[1], v[2]) end
+  core.blink_reset()
+end
+
 local commands = {
   ["doc:undo"] = function()
     doc():undo()
@@ -105,7 +102,7 @@ local commands = {
   ["doc:paste"] = function()
     local clipboard = system.get_clipboard()
     -- If the clipboard has changed since our last look, use that instead
-    if doc().cursor_clipboard["hash"] ~= system.hash(clipboard) then
+    if doc().cursor_clipboard["full"] ~= clipboard then
       doc().cursor_clipboard = {}
     end
     for idx, line1, col1, line2, col2 in doc():get_selections() do
diff --git a/src/api/system.c b/src/api/system.c
index 85238e34..2f1bf763 100644
--- a/src/api/system.c
+++ b/src/api/system.c
@@ -637,14 +637,6 @@ static int f_set_window_opacity(lua_State *L) {
   return 1;
 }
 
-static int f_hash(lua_State* L) {
-  unsigned i = RENCACHE_HASH_INITIAL;
-  size_t strLen;
-  const char *str = luaL_checklstring(L, 1, &strLen);
-  rencache_hash(&i, str, strLen) ;
-  lua_pushnumber(L, i);
-  return 1;
-}
 
 static const luaL_Reg lib[] = {
   { "poll_event",          f_poll_event          },
@@ -672,7 +664,6 @@ static const luaL_Reg lib[] = {
   { "exec",                f_exec                },
   { "fuzzy_match",         f_fuzzy_match         },
   { "set_window_opacity",  f_set_window_opacity  },
-  { "hash",                f_hash                },
   { NULL, NULL }
 };
 
diff --git a/src/rencache.c b/src/rencache.c
index 530615f4..31165e90 100644
--- a/src/rencache.c
+++ b/src/rencache.c
@@ -83,7 +83,10 @@ static void font_refs_clear(lua_State *L) {
   font_refs_len = 0;
 }
 
-void rencache_hash(unsigned *h, const void *data, int size) {
+/* 32bit fnv-1a hash */
+#define HASH_INITIAL 2166136261
+
+static void hash(unsigned *h, const void *data, int size) {
   const unsigned char *p = data;
   while (size--) {
     *h = (*h ^ *p++) * 16777619;
@@ -224,7 +227,7 @@ static void update_overlapping_cells(RenRect r, unsigned h) {
   for (int y = y1; y <= y2; y++) {
     for (int x = x1; x <= x2; x++) {
       int idx = cell_idx(x, y);
-      rencache_hash(&cells[idx], &h, sizeof(h));
+      hash(&cells[idx], &h, sizeof(h));
     }
   }
 }
@@ -252,8 +255,8 @@ void rencache_end_frame(lua_State *L) {
     if (cmd->type == SET_CLIP) { cr = cmd->rect; }
     RenRect r = intersect_rects(cmd->rect, cr);
     if (r.width == 0 || r.height == 0) { continue; }
-    unsigned h = RENCACHE_HASH_INITIAL;
-    rencache_hash(&h, cmd, cmd->size);
+    unsigned h = HASH_INITIAL;
+    hash(&h, cmd, cmd->size);
     update_overlapping_cells(r, h);
   }
 
@@ -268,7 +271,7 @@ void rencache_end_frame(lua_State *L) {
       if (cells[idx] != cells_prev[idx]) {
         push_rect((RenRect) { x, y, 1, 1 }, &rect_count);
       }
-      cells_prev[idx] = RENCACHE_HASH_INITIAL;
+      cells_prev[idx] = HASH_INITIAL;
     }
   }
 
diff --git a/src/rencache.h b/src/rencache.h
index 95a088d6..1d0f45a6 100644
--- a/src/rencache.h
+++ b/src/rencache.h
@@ -5,12 +5,8 @@
 #include <lua.h>
 #include "renderer.h"
 
-/* 32bit fnv-1a hash */
-#define RENCACHE_HASH_INITIAL 2166136261
-
 void rencache_show_debug(bool enable);
 void rencache_set_clip_rect(RenRect rect);
-void rencache_hash(unsigned *h, const void *data, int size);
 void rencache_draw_rect(RenRect rect, RenColor color);
 int  rencache_draw_text(lua_State *L, FontDesc *font_desc, int font_index, const char *text, int x, int y, RenColor color,
   bool draw_subpixel, CPReplaceTable *replacements, RenColor replace_color);