diff --git a/.gitignore b/.gitignore
index 267007b7..14eccf95 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,11 +14,13 @@
 *.pdb
 *.rej
 *.s
+*.si
 *.swp
 *.xml
 .*swo
 *~
 \#*
+.\#*
 *.bak
 *.tmp
 .git-ignore
@@ -54,6 +56,7 @@ TAGS
 /macros/macros.c
 /nasm
 /ndisasm
+/nasm.spec
 /nsis/arch.nsh
 /nsis/version.nsh
 /rdoff/Makefile
diff --git a/Makefile.in b/Makefile.in
index 6764f961..6a4010ef 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -425,8 +425,8 @@ perlbreq.si: $(ALLPERLSRC)
 	sed -r -e '/perl\((strict|warnings)\)/d' | \
 	sort | uniq > perlbreq.si || ( rm -f perlbreq.si ; false )
 
-nasm.spec: nasm.spec.in version.sed perlbreq.si
-	sed -f version.sed -e '/@@PERLBUILDREQS@@/r perlbreq.si' \
+nasm.spec: nasm.spec.in nasm.spec.sed version.sed perlbreq.si
+	sed -f version.sed -f nasm.spec.sed \
 	< nasm.spec.in > nasm.spec || ( rm -f nasm.spec ; false )
 
 splint:
diff --git a/nasm.spec.sed b/nasm.spec.sed
new file mode 100644
index 00000000..ae0d039b
--- /dev/null
+++ b/nasm.spec.sed
@@ -0,0 +1,3 @@
+# Replace @@PERLBUILDREQS@@ with the file perlbreq.si
+/@@PERLBUILDREQS@@/{r perlbreq.si
+d}