diff --git a/sim/Makefile.in b/sim/Makefile.in
index 1e94771577d..b407b37803c 100644
--- a/sim/Makefile.in
+++ b/sim/Makefile.in
@@ -5823,7 +5823,7 @@ testsuite/common/bits64m63.c: testsuite/common/bits-gen$(EXEEXT) testsuite/commo
 
 @SIM_ENABLE_ARCH_ppc_TRUE@ppc/defines.h: ppc/stamp-defines ; @true
 @SIM_ENABLE_ARCH_ppc_TRUE@ppc/stamp-defines: config.h Makefile
-@SIM_ENABLE_ARCH_ppc_TRUE@	$(AM_V_GEN)sed -n -e '/^#define HAVE_/s/ 1$$/",/' -e '/^#define HAVE_/s//"HAVE_/p' < config.h > ppc/defines.hin
+@SIM_ENABLE_ARCH_ppc_TRUE@	$(AM_V_GEN)$(SED) -n -e '/^#define HAVE_.*1$$/{ s/ 1$$/",/; s/.* HAVE_/"HAVE_/; p }' < config.h > ppc/defines.hin
 @SIM_ENABLE_ARCH_ppc_TRUE@	$(AM_V_at)$(SHELL) $(srcroot)/move-if-change ppc/defines.hin ppc/defines.h
 @SIM_ENABLE_ARCH_ppc_TRUE@	$(AM_V_at)touch $@
 
diff --git a/sim/ppc/local.mk b/sim/ppc/local.mk
index 3f495cb44c0..0031753b74b 100644
--- a/sim/ppc/local.mk
+++ b/sim/ppc/local.mk
@@ -80,7 +80,7 @@ noinst_PROGRAMS += %D%/run
 
 %D%/defines.h: %D%/stamp-defines ; @true
 %D%/stamp-defines: config.h Makefile
-	$(AM_V_GEN)sed -n -e '/^#define HAVE_/s/ 1$$/",/' -e '/^#define HAVE_/s//"HAVE_/p' < config.h > %D%/defines.hin
+	$(AM_V_GEN)$(SED) -n -e '/^#define HAVE_.*1$$/{ s/ 1$$/",/; s/.* HAVE_/"HAVE_/; p }' < config.h > %D%/defines.hin
 	$(AM_V_at)$(SHELL) $(srcroot)/move-if-change %D%/defines.hin %D%/defines.h
 	$(AM_V_at)touch $@