diff --git a/gfx/ots/include/opentype-sanitiser.h b/gfx/ots/include/opentype-sanitiser.h
--- a/gfx/ots/include/opentype-sanitiser.h
+++ b/gfx/ots/include/opentype-sanitiser.h
@@ -236,14 +236,16 @@ typedef TableAction (*TableActionFunc)(u
 // Set a callback function that will be called when OTS needs to decide what to
 // do for a font table.
 void OTS_API SetTableActionCallback(TableActionFunc func, void *user_data);
 
 // Force to disable debug output even when the library is compiled with
 // -DOTS_DEBUG.
 void DisableDebugOutput();
 
+#ifdef MOZ_OTS_WOFF2
 // Enable WOFF2 support(experimental).
 void EnableWOFF2();
+#endif
 
 }  // namespace ots
 
 #endif  // OPENTYPE_SANITISER_H_
diff --git a/gfx/ots/src/ots.cc b/gfx/ots/src/ots.cc
--- a/gfx/ots/src/ots.cc
+++ b/gfx/ots/src/ots.cc
@@ -9,25 +9,29 @@
 
 #include <algorithm>
 #include <cstdlib>
 #include <cstring>
 #include <limits>
 #include <map>
 #include <vector>
 
+#ifdef MOZ_OTS_WOFF2
 #include "woff2.h"
+#endif
 
 // The OpenType Font File
 // http://www.microsoft.com/typography/otspec/cmap.htm
 
 namespace {
 
 bool g_debug_output = true;
+#ifdef MOZ_OTS_WOFF2
 bool g_enable_woff2 = false;
+#endif
 
 ots::MessageFunc  g_message_func = NULL;
 void             *g_message_user_data = NULL;
 
 ots::TableActionFunc  g_table_action_func = NULL;
 void                 *g_table_action_user_data = NULL;
 
 // Generate a message with or without a table tag, when 'header' is the OpenTypeFile pointer
@@ -395,16 +399,17 @@ bool ProcessWOFF(ots::OpenTypeFile *head
   }
   if (block_end != ots::Round4(length)) {
     return OTS_FAILURE_MSG_HDR("file length mismatch (trailing junk?)");
   }
 
   return ProcessGeneric(header, woff_tag, output, data, length, tables, file);
 }
 
+#ifdef MOZ_OTS_WOFF2
 bool ProcessWOFF2(ots::OpenTypeFile *header,
                   ots::OTSStream *output, const uint8_t *data, size_t length) {
   size_t decompressed_size = ots::ComputeWOFF2FinalSize(data, length);
   if (decompressed_size == 0) {
     return OTS_FAILURE();
   }
   // decompressed font must be <= 30MB
   if (decompressed_size > 30 * 1024 * 1024) {
@@ -413,16 +418,17 @@ bool ProcessWOFF2(ots::OpenTypeFile *hea
 
   std::vector<uint8_t> decompressed_buffer(decompressed_size);
   if (!ots::ConvertWOFF2ToTTF(&decompressed_buffer[0], decompressed_size,
                               data, length)) {
     return OTS_FAILURE();
   }
   return ProcessTTF(header, output, &decompressed_buffer[0], decompressed_size);
 }
+#endif
 
 ots::TableAction GetTableAction(uint32_t tag) {
   ots::TableAction action = ots::TABLE_ACTION_DEFAULT;
 
   if (g_table_action_func != NULL) {
     action = g_table_action_func(htonl(tag), g_table_action_user_data);
   }
 
@@ -795,19 +801,21 @@ bool IsValidVersionTag(uint32_t tag) {
          tag == Tag("true") ||
          tag == Tag("typ1");
 }
 
 void DisableDebugOutput() {
   g_debug_output = false;
 }
 
+#ifdef MOZ_OTS_WOFF2
 void EnableWOFF2() {
   g_enable_woff2 = true;
 }
+#endif
 
 void SetMessageCallback(MessageFunc func, void *user_data) {
   g_message_func = func;
   g_message_user_data = user_data;
 }
 
 void SetTableActionCallback(TableActionFunc func, void *user_data) {
   g_table_action_func = func;
@@ -822,20 +830,22 @@ bool Process(OTSStream *output, const ui
 
   if (length < 4) {
     return OTS_FAILURE_MSG_(&header, "file less than 4 bytes");
   }
 
   bool result;
   if (data[0] == 'w' && data[1] == 'O' && data[2] == 'F' && data[3] == 'F') {
     result = ProcessWOFF(&header, output, data, length);
+#ifdef MOZ_OTS_WOFF2
   } else if (g_enable_woff2 &&
              data[0] == 'w' && data[1] == 'O' && data[2] == 'F' &&
              data[3] == '2') {
     result = ProcessWOFF2(&header, output, data, length);
+#endif
   } else {
     result = ProcessTTF(&header, output, data, length);
   }
 
   for (unsigned i = 0; ; ++i) {
     if (table_parsers[i].parse == NULL) break;
     table_parsers[i].free(&header);
   }