diff --git a/lib/glacier/string/string.cpp b/lib/glacier/string/string.cpp
index 4e193d1..3210080 100644
--- a/lib/glacier/string/string.cpp
+++ b/lib/glacier/string/string.cpp
@@ -14,6 +14,8 @@ uint64_t cstrlen(const char* cstr) {
 
 }  // namespace
 
+String::String() : cstr_(nullptr), length_(0) {}
+
 String::String(const char* str) : String(str, cstrlen(str)) {}
 
 String::String(const char* cstr, uint64_t str_len) : length_(str_len) {
diff --git a/lib/glacier/string/string.h b/lib/glacier/string/string.h
index e919a7c..081f208 100644
--- a/lib/glacier/string/string.h
+++ b/lib/glacier/string/string.h
@@ -6,6 +6,7 @@ namespace glcr {
 
 class String {
  public:
+  String();
   String(const char* cstr);
   String(const char* cstr, uint64_t str_len);