diff --git a/rtl/linux/aarch64/sighnd.inc b/rtl/linux/aarch64/sighnd.inc
index 57f10c470b..06b72341e5 100644
--- a/rtl/linux/aarch64/sighnd.inc
+++ b/rtl/linux/aarch64/sighnd.inc
@@ -15,7 +15,7 @@
 
  **********************************************************************}
 
-{$define SYSTEM_DEBUG}
+{ $define SYSTEM_DEBUG}
 
 procedure SignalToRunerror(Sig: longint; SigInfo: PSigInfo; UContext: PUContext); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;