diff --git a/objectivec/GPBCodedInputStream.m b/objectivec/GPBCodedInputStream.m
index 57d04dde3830..4c8d640fda66 100644
--- a/objectivec/GPBCodedInputStream.m
+++ b/objectivec/GPBCodedInputStream.m
@@ -93,14 +93,22 @@ static int8_t ReadRawByte(GPBCodedInputStreamState *state) {
 
 static int32_t ReadRawLittleEndian32(GPBCodedInputStreamState *state) {
   CheckSize(state, sizeof(int32_t));
-  int32_t value = OSReadLittleInt32(state->bytes, state->bufferPos);
+  // Not using OSReadLittleInt32 because it has undocumented dependency
+  // on reads being aligned.
+  int32_t value;
+  memcpy(&value, state->bytes + state->bufferPos, sizeof(int32_t));
+  value = OSSwapLittleToHostInt32(value);
   state->bufferPos += sizeof(int32_t);
   return value;
 }
 
 static int64_t ReadRawLittleEndian64(GPBCodedInputStreamState *state) {
   CheckSize(state, sizeof(int64_t));
-  int64_t value = OSReadLittleInt64(state->bytes, state->bufferPos);
+  // Not using OSReadLittleInt64 because it has undocumented dependency
+  // on reads being aligned.  
+  int64_t value;
+  memcpy(&value, state->bytes + state->bufferPos, sizeof(int64_t));
+  value = OSSwapLittleToHostInt64(value);
   state->bufferPos += sizeof(int64_t);
   return value;
 }