diff --git a/config/CONFIG.Vx.ppc603 b/config/CONFIG.Vx.ppc603
index e627a47e2..fc1b9961c 100644
--- a/config/CONFIG.Vx.ppc603
+++ b/config/CONFIG.Vx.ppc603
@@ -13,4 +13,5 @@ ARCH_CLASS = ppc
 ARCH_DEP_CPPFLAGS = -DCPU=PPC603 -DTRUE=1
 ARCH_DEP_CFLAGS = -mcpu=603 --no-builtin -mstrict-align
 
-# ARCH_DEP_CFLAGS== -fsigned-char     #May need for calcPerform.c
+# ARCH_DEP_CFLAGS+= -fsigned-char     #May need for calcPerform.c
+# ARCH_DEP_CFLAGS+= -mlongcall        #May need if over 32MB
diff --git a/config/CONFIG.Vx.ppc604 b/config/CONFIG.Vx.ppc604
index 71125a5df..aa4e60ac1 100644
--- a/config/CONFIG.Vx.ppc604
+++ b/config/CONFIG.Vx.ppc604
@@ -13,5 +13,6 @@ ARCH_CLASS = ppc
 ARCH_DEP_CPPFLAGS = -DCPU=PPC604 -D_GNU_TOOL -DTRUE=1
 ARCH_DEP_CFLAGS = -mcpu=604 --no-builtin -mstrict-align
 
-# ARCH_DEP_CFLAGS== -fsigned-char     #May need for calcPerform.c
+# ARCH_DEP_CFLAGS+= -fsigned-char     #May need for calcPerform.c
+# ARCH_DEP_CFLAGS+= -mlongcall        #May need if over 32MB