diff --git a/rtl/inc/ctypes.pp b/rtl/inc/ctypes.pp
index 8ef58c0a9a..6096af22bb 100644
--- a/rtl/inc/ctypes.pp
+++ b/rtl/inc/ctypes.pp
@@ -17,6 +17,8 @@
 
 unit ctypes;
 
+{$inline on}
+
 interface
 
 {$ifdef unix}