diff --git a/file.spec b/file.spec
index 150fc51..27abac3 100644
--- a/file.spec
+++ b/file.spec
@@ -127,6 +127,8 @@ to develop applications that require the magic "file" interface.
 %patch34 -p0 -b .endian
 %patch35 -p0 -b .nitpick
 %patch -b .0
+test -s src/magic.h.in || cp -p src/magic.h src/magic.h.in
+
 %build
 export LANG=POSIX
 export LC_ALL=POSIX