diff --git a/qtrt/c.go b/qtrt/c.go
index 020dc13d..b1f8be67 100644
--- a/qtrt/c.go
+++ b/qtrt/c.go
@@ -1,6 +1,6 @@
 package qtrt
 
 /*
-#cgo pkg-config: libffi
+// #cgo pkg-config: libffi
 */
 import "C"