diff --git a/cmds/installd/otapreopt.cpp b/cmds/installd/otapreopt.cpp
index a58ba41..e0d23da 100644
--- a/cmds/installd/otapreopt.cpp
+++ b/cmds/installd/otapreopt.cpp
@@ -150,10 +150,9 @@
             value[kPropertyValueMax - 1] = 0;
             return strlen(default_value);// TODO: Need to truncate?
         }
-        size_t size = std::min(kPropertyValueMax - 1, prop_value->length());
+        size_t size = std::min(kPropertyValueMax - 1, prop_value->length()) + 1;
         strlcpy(value, prop_value->data(), size);
-        value[size] = 0;
-        return static_cast<int>(size);
+        return static_cast<int>(size - 1);
     }
 
     std::string GetOTADataDirectory() const {