diff --git a/appl/xnlock/Makefile.in b/appl/xnlock/Makefile.in
index 2aa474009..55fdac720 100644
--- a/appl/xnlock/Makefile.in
+++ b/appl/xnlock/Makefile.in
@@ -17,7 +17,7 @@ CFLAGS = $(XINCS) @CFLAGS@
 LD_FLAGS = @LD_FLAGS@
 LIBS = $(XLIBS) @LIBS@
 INSTALL = @INSTALL@
-INSTALL_DATA = $(INSTALL)
+INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 MKINSTALLDIRS = @top_srcdir@/mkinstalldirs