diff --git a/Makefile b/Makefile
index 948e3faf..6492ea16 100644
--- a/Makefile
+++ b/Makefile
@@ -134,7 +134,7 @@ silentcheck: | $(BINLIBRARY)
 	TESTARGS=-silent $(MAKE) -f $(MAKEFILE) -s check
 configure: .config
 .config: Makefile.configure
-	$(MAKE) -f $(SRCDIR)Makefile.configure OUT='>&9' configure 9> $@
+	$(MAKE) -f $(SRCDIR)Makefile.configure OUT='$@' configure
 
 lib/libtinycbor-freestanding.a: $(TINYCBOR_FREESTANDING_SOURCES:.c=.o)
 	@$(MKDIR) -p lib
diff --git a/Makefile.configure b/Makefile.configure
index c2f51eea..16bab6bb 100644
--- a/Makefile.configure
+++ b/Makefile.configure
@@ -27,9 +27,9 @@ sink:
 configure: $(foreach it,$(ALLTESTS),check-$(it))
 
 check-%:
-	@echo $(subst check-,,$@)-tested := 1 $(OUT)
+	@echo $(subst check-,,$@)-tested := 1 >>$(OUT)
 	$(if $(V),,@)if printf "$($(subst check-,PROGRAM-,$@))" | \
 	    $(CC) -xc $($(subst check-,CCFLAGS-,$@)) -o /dev/null - $(if $(V),,>/dev/null 2>&1); \
 	then \
-	    echo $(subst check-,,$@)-pass := 1 $(OUT); \
+	    echo $(subst check-,,$@)-pass := 1 >>$(OUT); \
 	fi