diff --git a/rtl/wii/Makefile b/rtl/wii/Makefile
index 872a847781..3b04a5d72f 100644
--- a/rtl/wii/Makefile
+++ b/rtl/wii/Makefile
@@ -341,7 +341,7 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
 SYSTEMUNIT=system
-override FPCOPT+=@rtl.cfg
+override FPC_SYSTEM_OPT+=@rtl.cfg
 ifdef RELEASE
 override FPCOPT+=-Ur
 endif
diff --git a/rtl/wii/Makefile.fpc b/rtl/wii/Makefile.fpc
index 5ba4a4379b..70eb01f0fb 100644
--- a/rtl/wii/Makefile.fpc
+++ b/rtl/wii/Makefile.fpc
@@ -48,7 +48,7 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
 SYSTEMUNIT=system
-override FPCOPT+=@rtl.cfg
+override FPC_SYSTEM_OPT+=@rtl.cfg
 
 ifdef RELEASE
 override FPCOPT+=-Ur