diff --git a/util-networks-covariates.R b/util-networks-covariates.R
index 88daa050..9d560fed 100644
--- a/util-networks-covariates.R
+++ b/util-networks-covariates.R
@@ -1618,7 +1618,7 @@ get.first.activity.data = function(range.data, activity.types = c("commits", "ma
 
     for (missing.key in missing.keys) {
         logging::logwarn(paste("The type", missing.key, "was configured but the RangeData did not contain any",
-                                 "activities of that type"), sep = " ")
+                                 "activities of that type", sep = " "))
         activity.by.type[missing.key] = na.list
     }