diff --git a/lib/determine-basal/determine-basal.js b/lib/determine-basal/determine-basal.js
index eeb98f0af..e67ee3e7b 100644
--- a/lib/determine-basal/determine-basal.js
+++ b/lib/determine-basal/determine-basal.js
@@ -192,21 +192,21 @@ var determine_basal = function determine_basal(glucose_status, currenttemp, iob_
             process.stderr.write("Adjusting targets for high BG: min_bg from "+min_bg+" to "+adjustedMinBG+"; ");
             min_bg = adjustedMinBG;
         } else {
-            process.stderr.write("min_bg unchanged:"+min_bg+"; ");
+            process.stderr.write("min_bg unchanged: "+min_bg+"; ");
         }
         // if eventualBG, naive_eventualBG, and target_bg aren't all above adjustedTargetBG, don’t use it
         if (eventualBG > adjustedTargetBG && naive_eventualBG > adjustedTargetBG && target_bg > adjustedTargetBG) {
             process.stderr.write("target_bg from "+target_bg+" to "+adjustedTargetBG+"; ");
             target_bg = adjustedTargetBG;
         } else {
-            process.stderr.write("target_bg unchanged:"+target_bg+"; ");
+            process.stderr.write("target_bg unchanged: "+target_bg+"; ");
         }
         // if eventualBG, naive_eventualBG, and max_bg aren't all above adjustedMaxBG, don’t use it
         if (eventualBG > adjustedMaxBG && naive_eventualBG > adjustedMaxBG && max_bg > adjustedMaxBG) {
             console.error("max_bg from "+max_bg+" to "+adjustedMaxBG);
             max_bg = adjustedMaxBG;
         } else {
-            console.error("max_bg unchanged:"+max_bg);
+            console.error("max_bg unchanged: "+max_bg);
         }
     }