diff --git a/wmcalc/Makefile b/wmcalc/Makefile
index 4dc8440..90a0fd7 100644
--- a/wmcalc/Makefile
+++ b/wmcalc/Makefile
@@ -28,5 +28,5 @@ install::
 	$(INSTALL_PROGRAM) wmcalc $(DESTDIR)$(BINDIR)
 	$(INSTALL_DIR) $(DESTDIR)$(CONF)
 	$(INSTALL_FILE) wmcalc.conf $(DESTDIR)$(CONF)
-	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)/man1
+	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)
 	$(INSTALL_FILE) wmcalc.1 $(DESTDIR)$(MANDIR)