diff --git a/yocto-poky/meta/conf/machine/include/powerpc/arch-powerpc.inc b/yocto-poky/meta/conf/machine/include/powerpc/arch-powerpc.inc
index 036ca3c..9cf6b88 100644
--- a/yocto-poky/meta/conf/machine/include/powerpc/arch-powerpc.inc
+++ b/yocto-poky/meta/conf/machine/include/powerpc/arch-powerpc.inc
@@ -9,15 +9,15 @@
 ABIEXTENSION ?= ""
 
 TUNEVALID[m32] = "Power ELF32 standard ABI"
-TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "m32", " -m32", "", d)}"
-TUNE_ARCH .= "${@bb.utils.contains("TUNE_FEATURES", "m32", "powerpc", "", d)}"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'm32', ' -m32', '', d)}"
+TUNE_ARCH .= "${@bb.utils.contains('TUNE_FEATURES', 'm32', 'powerpc', '', d)}"
 
 TUNEVALID[fpu-hard] = "Use hardware FPU."
-TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "fpu-hard", " -mhard-float", "", d)}"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'fpu-hard', ' -mhard-float', '', d)}"
 
 TUNEVALID[fpu-soft] = "Use software FPU."
-TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "fpu-soft", " -msoft-float", "", d)}"
-TARGET_FPU .= "${@bb.utils.contains("TUNE_FEATURES", "fpu-soft", "soft", "", d)}"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'fpu-soft', ' -msoft-float', '', d)}"
+TARGET_FPU .= "${@bb.utils.contains('TUNE_FEATURES', 'fpu-soft', 'soft', '', d)}"
 
 TUNEVALID[altivec] = "Altivec"