--- a/src/pkg_columnizer.cc
+++ b/src/pkg_columnizer.cc
@@ -71,8 +71,8 @@
   {30, false, false},   // origin
   {10, true, true},     // archive
   {9, false, false},    // sizechange
-  {strlen(PACKAGE), false, false},  // progname
-  {strlen(VERSION), false, false},  // progver
+  {static_cast<unsigned int>(strlen(PACKAGE)), false, false},  // progname
+  {static_cast<unsigned int>(strlen(VERSION)), false, false},  // progver
   {12, false, false},   // brokencount
   {16, false, false},   // diskusage, example (max): "Disk: -2,587 kB "
   {22, false, false},   // downloadsize, example (max): " DL: 2,586 kB/2,587 kB"