diff --git a/build/unix/makeonepcm.sh b/build/unix/makeonepcm.sh
index 43cfe52f68f9e831a557e23d067c06680c26d05b..c78c6f29a2beffabd363e3f045c414a6991ec1a5 100755
--- a/build/unix/makeonepcm.sh
+++ b/build/unix/makeonepcm.sh
@@ -147,7 +147,7 @@ find $srcdir -path '*/test' -prune -o \
              -path '*/include' -prune -o \
              -follow \
              -name '*LinkDef*.h' -print | \
-  grep -v -e '/RooFitCore_LinkDef.h$' | \
+  grep -v -e '/RooFitCore_LinkDef.h$' -e "$srcdir/*LinkDef*.h" | \
   sed -e 's|^|#include "|' -e 's|$|"|' > alldefs.h
 
 mv alldefs.h include/allLinkDef.h