diff --git a/src/string.cc b/src/string.cc
index edfd4cf6..69c8f946 100644
--- a/src/string.cc
+++ b/src/string.cc
@@ -307,6 +307,13 @@ InplaceString<15> to_string(int val)
     return res;
 }
 
+InplaceString<15> to_string(unsigned val)
+{
+    InplaceString<15> res;
+    res.m_length = sprintf(res.m_data, "%u", val);
+    return res;
+}
+
 InplaceString<23> to_string(long int val)
 {
     InplaceString<23> res;
diff --git a/src/string.hh b/src/string.hh
index 74fbb51a..d1c6aa0e 100644
--- a/src/string.hh
+++ b/src/string.hh
@@ -327,6 +327,7 @@ inline Hex hex(size_t val) { return {val}; }
 
 InplaceString<15> to_string(int val);
 InplaceString<23> to_string(long int val);
+InplaceString<15> to_string(unsigned val);
 InplaceString<23> to_string(size_t val);
 InplaceString<23> to_string(Hex val);
 InplaceString<23> to_string(float val);