diff --git a/termbox2-bindings-c/src/Termbox2/Bindings/C.hs b/termbox2-bindings-c/src/Termbox2/Bindings/C.hs
index 8565751..fa97c0b 100644
--- a/termbox2-bindings-c/src/Termbox2/Bindings/C.hs
+++ b/termbox2-bindings-c/src/Termbox2/Bindings/C.hs
@@ -49,12 +49,6 @@ module Termbox2.Bindings.C
     tb_last_errno,
     tb_strerror,
 
-    -- ** Query compile-time constants
-    tb_attr_width,
-    tb_has_egc,
-    tb_has_truecolor,
-    tb_version,
-
     -- * Objects
     Tb_cell (..),
     Tb_event (..),
@@ -362,13 +356,10 @@ import Termbox2.Bindings.C.Internal.Constants
   )
 import Termbox2.Bindings.C.Internal.Event (Tb_event (..))
 import Termbox2.Bindings.C.Internal.Functions
-  ( tb_attr_width,
-    tb_cell_buffer,
+  ( tb_cell_buffer,
     tb_clear,
     tb_extend_cell,
     tb_get_fds,
-    tb_has_egc,
-    tb_has_truecolor,
     tb_height,
     tb_hide_cursor,
     tb_init,
@@ -392,6 +383,5 @@ import Termbox2.Bindings.C.Internal.Functions
     tb_set_output_mode,
     tb_shutdown,
     tb_strerror,
-    tb_version,
     tb_width,
   )
diff --git a/termbox2-bindings-c/src/Termbox2/Bindings/C/Internal/Functions.hs b/termbox2-bindings-c/src/Termbox2/Bindings/C/Internal/Functions.hs
index 5d2196d..30b7a23 100644
--- a/termbox2-bindings-c/src/Termbox2/Bindings/C/Internal/Functions.hs
+++ b/termbox2-bindings-c/src/Termbox2/Bindings/C/Internal/Functions.hs
@@ -1,11 +1,8 @@
 module Termbox2.Bindings.C.Internal.Functions
-  ( tb_attr_width,
-    tb_cell_buffer,
+  ( tb_cell_buffer,
     tb_clear,
     tb_extend_cell,
     tb_get_fds,
-    tb_has_egc,
-    tb_has_truecolor,
     tb_height,
     tb_hide_cursor,
     tb_init,
@@ -29,7 +26,6 @@ module Termbox2.Bindings.C.Internal.Functions
     tb_set_output_mode,
     tb_shutdown,
     tb_strerror,
-    tb_version,
     tb_width,
   )
 where
@@ -41,10 +37,6 @@ import Foreign.Ptr (FunPtr, Ptr)
 import Termbox2.Bindings.C.Internal.Cell (Tb_cell)
 import Termbox2.Bindings.C.Internal.Event (Tb_event)
 
--- | Get how many bits wide attributes are.
-foreign import capi unsafe "termbox2.h tb_attr_width"
-  tb_attr_width :: CInt
-
 -- | Get a pointer to the back buffer.
 foreign import capi unsafe "termbox2.h tb_cell_buffer"
   tb_cell_buffer :: IO (Ptr Tb_cell)
@@ -61,14 +53,6 @@ foreign import capi unsafe "termbox2.h tb_extend_cell"
 foreign import capi unsafe "termbox2.h tb_get_fds"
   tb_get_fds :: Ptr CInt -> Ptr CInt -> IO CInt
 
--- | Get whether the library was compiled with extended grapheme cluster support (it was).
-foreign import capi unsafe "termbox2.h tb_has_egc"
-  tb_has_egc :: CInt
-
--- | Get whether the library was compiled with truecolor support (it was).
-foreign import capi unsafe "termbox2.h tb_has_truecolor"
-  tb_has_truecolor :: CInt
-
 -- | Get the terminal height.
 foreign import capi unsafe "termbox2.h tb_height"
   tb_height :: IO CInt
@@ -167,10 +151,6 @@ foreign import capi unsafe "termbox2.h tb_shutdown"
 foreign import capi unsafe "termbox2.h tb_strerror"
   tb_strerror :: CInt -> IO (ConstPtr CChar)
 
--- | Get the @termbox2@ version string.
-foreign import capi unsafe "termbox2.h tb_version"
-  tb_version :: ConstPtr CChar
-
 -- | Get the terminal height.
 foreign import capi unsafe "termbox2.h tb_width"
   tb_width :: IO CInt