diff --git a/debian/control b/debian/control
index 0ccf956..8c1a8e8 100644
--- a/debian/control
+++ b/debian/control
@@ -10,6 +10,7 @@ Build-Depends:
  libx11-dev,
  libxext-dev,
  libxpm-dev,
+ pkgconf,
 Standards-Version: 4.7.0
 Homepage: https://www.dockapps.net/wmcalclock
 Vcs-Browser: https://salsa.debian.org/wmaker-team/wmcalclock