diff --git a/src/stub/src/arch/powerpc/32/Makefile.extra b/src/stub/src/arch/powerpc/32/Makefile.extra
index 75733dbf..04f46f76 100644
--- a/src/stub/src/arch/powerpc/32/Makefile.extra
+++ b/src/stub/src/arch/powerpc/32/Makefile.extra
@@ -1,3 +1,5 @@
+# build lzma_d_cf.S and lzma_d_cs.S
+
 MAKEFLAGS += -rR
 .SUFFIXES:
 .SECONDEXPANSION:
@@ -33,8 +35,8 @@ lzma_d_c%.S : tc_list = method-lzma powerpc-linux.elf default
 lzma_d_c%.S : tc_bfdname = elf32-powerpc
 
 c := tc.method-lzma.gcc
-$c  = $(tc.powerpc-linux.elf.gcc)
-$c += -mcpu=405 -fPIC
+$c  = $(tc.powerpc-linux.elf.gcc) -mcpu=405
+$c += -fPIC
 $c += -fomit-frame-pointer
 $c += -fno-unit-at-a-time
 $c += -ffunction-sections
diff --git a/src/stub/src/arch/powerpc/64/Makefile b/src/stub/src/arch/powerpc/64/Makefile
index 8810fd41..ff0b0eff 100644
--- a/src/stub/src/arch/powerpc/64/Makefile
+++ b/src/stub/src/arch/powerpc/64/Makefile
@@ -1 +1,3 @@
-#include ../64le/Makefile
+# convenience Makefile
+default %:
+	$(MAKE) -C ../../../.. $@
diff --git a/src/stub/src/arch/powerpc/64/Makefile.extra b/src/stub/src/arch/powerpc/64/Makefile.extra
index b97ce805..06875887 100644
--- a/src/stub/src/arch/powerpc/64/Makefile.extra
+++ b/src/stub/src/arch/powerpc/64/Makefile.extra
@@ -1,6 +1,5 @@
-# How to transform from source code in src/stub/src/c/lzma_d_c.c
-# to the pieces for use in UPX runtime decompression stub.
-#
+# build lzma_d_cf.S and lzma_d_cs.S
+
 MAKEFLAGS += -rR
 .SUFFIXES:
 .SECONDEXPANSION:
@@ -36,7 +35,7 @@ lzma_d_c%.S : tc_list = method-lzma powerpc64-linux.elf default
 lzma_d_c%.S : tc_bfdname = elf64-powerpc
 
 c := tc.method-lzma.gcc
-$c = powerpc64-linux-gcc-4.9.2
+$c  = $(tc.powerpc64-linux.elf.gcc)
 $c += -fPIC
 $c += -fomit-frame-pointer
 $c += -fno-unit-at-a-time
diff --git a/src/stub/src/arch/powerpc/64le/Makefile.extra b/src/stub/src/arch/powerpc/64le/Makefile.extra
index c4fdacc8..e469fd5e 100644
--- a/src/stub/src/arch/powerpc/64le/Makefile.extra
+++ b/src/stub/src/arch/powerpc/64le/Makefile.extra
@@ -1,6 +1,5 @@
-# How to transform from source code in src/stub/src/c/lzma_d_c.c
-# to the pieces for use in UPX runtime decompression stub.
-#
+# build lzma_d_cf.S and lzma_d_cs.S
+
 MAKEFLAGS += -rR
 .SUFFIXES:
 .SECONDEXPANSION:
@@ -37,7 +36,7 @@ lzma_d_c%.S : tc_bfdname = elf64-powerpcle
 
 c := tc.method-lzma.gcc
 $c  = $(tc.powerpc64le-linux.elf.gcc)
-$c += -mcpu=405 -fPIC
+$c += -fPIC
 $c += -fomit-frame-pointer
 $c += -fno-unit-at-a-time
 $c += -ffunction-sections