diff --git a/mpn/Makeasm.am b/mpn/Makeasm.am
index 5d7306c..d70c5cd 100644
--- a/mpn/Makeasm.am
+++ b/mpn/Makeasm.am
@@ -66,7 +66,7 @@ SUFFIXES = .s .S .asm
 
 
 # can be overridden during development, eg. "make RM_TMP=: mul_1.lo"
-RM_TMP = rm -f
+RM_TMP = true
 
 
 # .S assembler, preprocessed with cpp.
diff --git a/mpn/m4-ccas b/mpn/m4-ccas
index 16d80c6..22de52a 100755
--- a/mpn/m4-ccas
+++ b/mpn/m4-ccas
@@ -104,4 +104,4 @@ echo "$CC"
 $CC || exit
 
 # Comment this out to preserve .s intermediates
-rm -f $TMP
+#rm -f $TMP