diff --git a/src/hb-wasm-api-font.hh b/src/hb-wasm-api-font.hh
index 4c641e971..10f1a30c2 100644
--- a/src/hb-wasm-api-font.hh
+++ b/src/hb-wasm-api-font.hh
@@ -174,6 +174,22 @@ HB_WASM_API (bool_t, font_copy_glyph_outline) (HB_WASM_EXEC_ENV
   return true;
 }
 
+HB_WASM_API (void, glyph_outline_free) (HB_WASM_EXEC_ENV
+					ptr_d(glyph_outline_t, outline))
+{
+  HB_PTR_PARAM (glyph_outline_t, outline);
+  if (unlikely (!outline))
+    return;
+
+  module_free (outline->points);
+  module_free (outline->contours);
+
+  outline->n_points = 0;
+  outline->points = nullref;
+  outline->n_contours = 0;
+  outline->contours = nullref;
+}
+
 
 }}
 
diff --git a/src/hb-wasm-api-list.hh b/src/hb-wasm-api-list.hh
index 4e5172450..2f0ede178 100644
--- a/src/hb-wasm-api-list.hh
+++ b/src/hb-wasm-api-list.hh
@@ -80,6 +80,9 @@ static NativeSymbol _hb_wasm_native_symbols[] =
   NATIVE_SYMBOL ("(ii$*)",	font_glyph_to_string),
   NATIVE_SYMBOL ("(iii)i",	font_copy_glyph_outline),
 
+  /* outline */
+  NATIVE_SYMBOL ("(i)",		glyph_outline_free),
+
   /* shape */
   NATIVE_SYMBOL ("(iiii$)i",	shape_with),
 
diff --git a/src/hb-wasm-api.h b/src/hb-wasm-api.h
index 9d8e9168f..94cf58fd4 100644
--- a/src/hb-wasm-api.h
+++ b/src/hb-wasm-api.h
@@ -254,11 +254,15 @@ typedef struct
 } glyph_outline_t;
 #define GLYPH_OUTLINE_INIT {0, 0, 0, 0}
 
+HB_WASM_API (void, glyph_outline_free) (HB_WASM_EXEC_ENV
+					ptr_d(glyph_outline_t, outline));
+
 HB_WASM_API (bool_t, font_copy_glyph_outline) (HB_WASM_EXEC_ENV
 					       ptr_d(font_t, font),
 					       codepoint_t glyph,
 					       ptr_d(glyph_outline_t, outline));
 
+
 /* shape */
 
 typedef struct
diff --git a/src/wasm/sample/c/shape-fallback.cc b/src/wasm/sample/c/shape-fallback.cc
index 9bb3a688f..7787bbae7 100644
--- a/src/wasm/sample/c/shape-fallback.cc
+++ b/src/wasm/sample/c/shape-fallback.cc
@@ -30,10 +30,14 @@ shape (void *shape_plan,
 
   debugprint1 ("buffer length", contents.length);
 
+  glyph_outline_t outline = GLYPH_OUTLINE_INIT;
+
   for (unsigned i = 0; i < contents.length; i++)
   {
     char name[64];
 
+    debugprint1 ("glyph at", i);
+
     font_glyph_to_string (font, contents.info[i].codepoint, name, sizeof (name));
 
     debugprint (name);
@@ -41,11 +45,13 @@ shape (void *shape_plan,
     contents.info[i].codepoint = font_get_glyph (font, contents.info[i].codepoint, 0);
     contents.pos[i].x_advance = font_get_glyph_h_advance (font, contents.info[i].codepoint);
 
-    glyph_outline_t outline = GLYPH_OUTLINE_INIT;
     font_copy_glyph_outline (font, contents.info[i].codepoint, &outline);
+    debugprint1 ("num outline points", outline.n_points);
     debugprint1 ("num outline contours", outline.n_contours);
   }
 
+  glyph_outline_free (&outline);
+
   bool_t ret = buffer_set_contents (buffer, &contents);
 
   buffer_contents_free (&contents);