--- a/dom/media/webaudio/AudioNodeEngine.cpp
+++ b/dom/media/webaudio/AudioNodeEngine.cpp
@@ -73,20 +73,17 @@ void AudioBufferAddWithScale(const float
 #ifdef BUILD_ARM_NEON
   if (mozilla::supports_neon()) {
     AudioBufferAddWithScale_NEON(aInput, aScale, aOutput, aSize);
     return;
   }
 #endif
 
 #ifdef USE_SSE2
-  // TODO: See Bug 1266112, we should either fix the source of the unaligned
-  //       buffers or do as much as possible with vector instructions and
-  //       fallback to scalar instructions where necessary.
-  if (mozilla::supports_sse2() && IS_ALIGNED16(aInput) && IS_ALIGNED16(aOutput)) {
+  if (mozilla::supports_sse2()) {
     AudioBufferAddWithScale_SSE(aInput, aScale, aOutput, aSize);
     return;
   }
 #endif
 
   if (aScale == 1.0f) {
     for (uint32_t i = 0; i < aSize; ++i) {
       aOutput[i] += aInput[i];
@@ -117,20 +114,17 @@ AudioBlockCopyChannelWithScale(const flo
 #ifdef BUILD_ARM_NEON
     if (mozilla::supports_neon()) {
       AudioBlockCopyChannelWithScale_NEON(aInput, aScale, aOutput);
       return;
     }
 #endif
 
 #ifdef USE_SSE2
-    // TODO: See Bug 1266112, we should either fix the source of the unaligned
-    //       buffers or do as much as possible with vector instructions and
-    //       fallback to scalar instructions where necessary.
-    if (mozilla::supports_sse2() && IS_ALIGNED16(aInput) && IS_ALIGNED16(aOutput)) {
+    if (mozilla::supports_sse2()) {
       AudioBlockCopyChannelWithScale_SSE(aInput, aScale, aOutput);
       return;
     }
 #endif
 
     for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
       aOutput[i] = aInput[i]*aScale;
     }