diff --git a/rtl/aros/Makefile b/rtl/aros/Makefile
index bcc8cfaa5e..53b45bfc03 100644
--- a/rtl/aros/Makefile
+++ b/rtl/aros/Makefile
@@ -367,10 +367,10 @@ override FPCOPT+=-Ur
 endif
 OBJPASDIR=$(RTL)/objpas
 ifeq ($(ARCH),i386)
-CPU_UNITS=cpu mmx lineinfo
+CPUUNITS=cpu mmx lineinfo
 endif
 ifeq ($(ARCH),x86_64)
-CPU_UNITS=cpu
+CPUUNITS=cpu
 endif
 ifeq ($(FULL_TARGET),i386-linux)
 override TARGET_UNITS+=$(SYSTEMUNIT) heaptrc uuchar objpas macpas iso7185 extpas buildrtl cpall
diff --git a/rtl/aros/Makefile.fpc b/rtl/aros/Makefile.fpc
index fbd5a24749..59e3d1c0d9 100644
--- a/rtl/aros/Makefile.fpc
+++ b/rtl/aros/Makefile.fpc
@@ -60,11 +60,11 @@ endif
 OBJPASDIR=$(RTL)/objpas
 
 ifeq ($(ARCH),i386)
-CPU_UNITS=cpu mmx lineinfo
+CPUUNITS=cpu mmx lineinfo
 endif
 
 ifeq ($(ARCH),x86_64)
-CPU_UNITS=cpu
+CPUUNITS=cpu
 endif