diff --git a/Makefile.am b/Makefile.am
index e4e27e58..655e036e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,6 +86,7 @@ perl/Makefile.PL: perl/Makefile.PL.in Makefile
 ## Use sed and then mv to avoid problems if the user interrupts.
 	sed -e 's,\@LIBGTOP_LIBDIR\@,$(libdir),g' \
 	    -e 's,\@LIBGTOP_INCLUDEDIR\@,$(includedir),g' \
+	    -e 's,\@LIBGTOP_EXTRA_LIBS\@,$(LIBGTOP_EXTRA_LIBS),g' \
 	    -e 's,\@LIBGTOP_LIBS\@,$(LIBGTOP_LIBS),g' \
 	    -e 's,\@LIBGTOP_INCS\@,$(LIBGTOP_INCS),g' \
 	    -e 's,\@LIBGTOP_GUILE_LIBS\@,$(LIBGTOP_GUILE_LIBS),g' \