diff --git a/src/Corrade/Containers/String.cpp b/src/Corrade/Containers/String.cpp
index f78de84c7..e8e0319e9 100644
--- a/src/Corrade/Containers/String.cpp
+++ b/src/Corrade/Containers/String.cpp
@@ -189,6 +189,8 @@ String::String(String&& other) noexcept {
 }
 
 String& String::operator=(const String& other) {
+    if(other == *this) return *this;
+
     destruct();
 
     const std::pair<const char*, std::size_t> data = other.dataInternal();