diff -Nur original/src/truetype/ttdriver.c modified/src/truetype/ttdriver.c
--- original/src/truetype/ttdriver.c	2017-04-29 05:38:17.000000000 +0100
+++ modified/src/truetype/ttdriver.c	2017-06-11 15:11:59.313798025 +0100
@@ -357,6 +357,7 @@
     if ( FT_IS_SCALABLE( size->face ) )
     {
       error = tt_size_reset( ttsize, 0 );
+      ttsize->root.metrics = *ttsize->metrics;
 
 #ifdef TT_USE_BYTECODE_INTERPRETER
       /* for the `MPS' bytecode instruction we need the point size */
diff -Nur original/src/truetype/ttgload.c modified/src/truetype/ttgload.c
--- original/src/truetype/ttgload.c	2017-05-03 22:40:41.000000000 +0100
+++ modified/src/truetype/ttgload.c	2017-06-11 15:17:43.758145947 +0100
@@ -2038,7 +2038,7 @@
 
     y_scale = 0x10000L;
     if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
-      y_scale = size->metrics->y_scale;
+      y_scale = size->root.metrics.y_scale;
 
     if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )
       FT_Outline_Get_CBox( &glyph->outline, &bbox );
@@ -2070,7 +2070,7 @@
 
 
       widthp = tt_face_get_device_metrics( face,
-                                           size->metrics->x_ppem,
+                                           size->root.metrics.x_ppem,
                                            glyph_index );
 
 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
@@ -2637,11 +2637,11 @@
           if ( !glyph->metrics.horiAdvance && glyph->linearHoriAdvance )
             glyph->metrics.horiAdvance =
               FT_MulFix( glyph->linearHoriAdvance,
-                         size->metrics->x_scale );
+                         size->root.metrics.x_scale );
           if ( !glyph->metrics.vertAdvance && glyph->linearVertAdvance )
             glyph->metrics.vertAdvance =
               FT_MulFix( glyph->linearVertAdvance,
-                         size->metrics->y_scale );
+                         size->root.metrics.y_scale );
         }
 
         return FT_Err_Ok;
@@ -2737,7 +2737,7 @@
     /* TrueType glyphs at all sizes using the bytecode interpreter. */
     /*                                                              */
     if ( !( load_flags & FT_LOAD_NO_SCALE ) &&
-         size->metrics->y_ppem < 24         )
+         size->root.metrics.y_ppem < 24         )
       glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
 
   Exit: