diff --git a/Nim-for-C-programmers.md b/Nim-for-C-programmers.md
index a981196..cd858f2 100644
--- a/Nim-for-C-programmers.md
+++ b/Nim-for-C-programmers.md
@@ -356,7 +356,7 @@ proc foobar(a: ref TPerson) =
 double d = 3.1415926;
 int i = (int) d;
 d = (double) i;
-printf(%d, %g\n", i, d);
+printf("%d, %g\n", i, d);
 </pre>
 <pre>
 int x = 42;