diff --git a/include/freetype/internal/tttypes.h b/include/freetype/internal/tttypes.h
index c821741f8..b9788c783 100644
--- a/include/freetype/internal/tttypes.h
+++ b/include/freetype/internal/tttypes.h
@@ -1394,14 +1394,6 @@ FT_BEGIN_HEADER
    *   vert_metrics_offset ::
    *     The file offset of the 'vmtx' table.
    *
-   *   sph_found_func_flags ::
-   *     Flags identifying special bytecode functions (used by the v38
-   *     implementation of the bytecode interpreter).
-   *
-   *   sph_compatibility_mode ::
-   *     This flag is set if we are in ClearType backward compatibility mode
-   *     (used by the v38 implementation of the bytecode interpreter).
-   *
    *   ebdt_start ::
    *     The file offset of the sbit data table (CBDT, bdat, etc.).
    *
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index 93e89691d..79df4555d 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -3544,8 +3544,6 @@
     rec->opc            = (FT_UInt16)n;
     rec->start          = exc->IP + 1;
     rec->active         = TRUE;
-    rec->inline_delta   = FALSE;
-    rec->sph_fdef_flags = 0x0000;
 
     if ( n > exc->maxFunc )
       exc->maxFunc = (FT_UInt16)n;
diff --git a/src/truetype/ttobjs.h b/src/truetype/ttobjs.h
index d1834c046..40eb37b4c 100644
--- a/src/truetype/ttobjs.h
+++ b/src/truetype/ttobjs.h
@@ -162,8 +162,6 @@ FT_BEGIN_HEADER
     FT_Long   end;            /* where does it end?                     */
     FT_UInt   opc;            /* function #, or instruction code        */
     FT_Bool   active;         /* is it active?                          */
-    FT_Bool   inline_delta;   /* is function that defines inline delta? */
-    FT_ULong  sph_fdef_flags; /* flags to identify special functions    */
 
   } TT_DefRecord, *TT_DefArray;