diff --git a/src/glat.cc b/src/glat.cc
--- a/src/glat.cc
+++ b/src/glat.cc
@@ -4,9 +4,9 @@
 
 #include "glat.h"
 
 #include "gloc.h"
-#include "lz4.h"
+#include "mozilla/Compression.h"
 #include <list>
 #include <memory>
 
 namespace ots {
@@ -214,16 +214,17 @@ bool OpenTypeGLAT_v3::Parse(const uint8_
                             OTS_MAX_DECOMPRESSED_TABLE_SIZE / (1024.0 * 1024.0),
                             decompressed_size / (1024.0 * 1024.0));
       }
       std::unique_ptr<uint8_t> decompressed(new uint8_t[decompressed_size]());
-      int ret = LZ4_decompress_safe_partial(
+      size_t outputSize = 0;
+      bool ret = mozilla::Compression::LZ4::decompressPartial(
           reinterpret_cast<const char*>(data + table.offset()),
-          reinterpret_cast<char*>(decompressed.get()),
           table.remaining(),  // input buffer size (input size + padding)
+          reinterpret_cast<char*>(decompressed.get()),
           decompressed_size,  // target output size
-          decompressed_size);  // output buffer size
-      if (ret < 0 || unsigned(ret) != decompressed_size) {
-        return DropGraphite("Decompression failed with error code %d", ret);
+          &outputSize);  // return output size
+      if (!ret || outputSize != decompressed_size) {
+        return DropGraphite("Decompression failed");
       }
       return this->Parse(decompressed.get(), decompressed_size, true);
     }
     default:
diff --git a/src/silf.cc b/src/silf.cc
--- a/src/silf.cc
+++ b/src/silf.cc
@@ -4,9 +4,9 @@
 
 #include "silf.h"
 
 #include "name.h"
-#include "lz4.h"
+#include "mozilla/Compression.h"
 #include <cmath>
 #include <memory>
 
 namespace ots {
@@ -49,16 +49,17 @@ bool OpenTypeSILF::Parse(const uint8_t* 
                               OTS_MAX_DECOMPRESSED_TABLE_SIZE / (1024.0 * 1024.0),
                               decompressed_size / (1024.0 * 1024.0));
         }
         std::unique_ptr<uint8_t> decompressed(new uint8_t[decompressed_size]());
-        int ret = LZ4_decompress_safe_partial(
+        size_t outputSize = 0;
+        bool ret = mozilla::Compression::LZ4::decompressPartial(
             reinterpret_cast<const char*>(data + table.offset()),
-            reinterpret_cast<char*>(decompressed.get()),
             table.remaining(),  // input buffer size (input size + padding)
+            reinterpret_cast<char*>(decompressed.get()),
             decompressed_size,  // target output size
-            decompressed_size);  // output buffer size
-        if (ret < 0 || unsigned(ret) != decompressed_size) {
-          return DropGraphite("Decompression failed with error code %d", ret);
+            &outputSize);   // return output size
+        if (!ret || outputSize != decompressed_size) {
+          return DropGraphite("Decompression failed");
         }
         return this->Parse(decompressed.get(), decompressed_size, true);
       }
       default: