diff --git a/src/Main.cc b/src/Main.cc
index fb570545..67bece01 100644
--- a/src/Main.cc
+++ b/src/Main.cc
@@ -457,6 +457,9 @@ int main(int argc, char** argv) {
         data = parse_data_string(data);
       }
 
+      size_t original_size = data.size();
+      data.resize((data.size() + 7) & (~7), '\0');
+
       if (big_endian) {
         uint32_t* dwords = reinterpret_cast<uint32_t*>(data.data());
         for (size_t x = 0; x < (data.size() >> 2); x++) {
@@ -479,6 +482,8 @@ int main(int argc, char** argv) {
         }
       }
 
+      data.resize(original_size);
+
       if (isatty(fileno(stdout))) {
         print_data(stdout, data);
       } else {