diff --git a/src/printf.c b/src/printf.c
index 57b5883..e96fae3 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -195,6 +195,16 @@ void kernaux_printf_va(
         if (formatter.type == TYPE_PERCENT) {
             putchar('%');
         }
+        else if (formatter.type == TYPE_u) {
+            const unsigned int arg = va_arg(va, unsigned int);
+
+            char buf[20];
+            kernaux_itoa(arg, buf, 'd');
+
+            for (const char *arg_ptr = buf; *arg_ptr; ++arg_ptr) {
+                putchar(*arg_ptr);
+            }
+        }
         else if (formatter.type == TYPE_s) {
             const char *const arg = va_arg(va, char*);
 
diff --git a/tests/test_printf.c b/tests/test_printf.c
index 5e8b0af..603dbde 100644
--- a/tests/test_printf.c
+++ b/tests/test_printf.c
@@ -43,6 +43,7 @@ int main()
     test("Hello, Alex!", "Hello, %s!", "Alex");
     test("Hello, Alex!", "Hello, %c%c%c%c!", 'A', 'l', 'e', 'x');
     test("%", "%%");
+    test("123", "%u", 123);
 
     return 0;
 }