diff --git a/app/src/main/java/de/jotomo/ruffyscripter/commands/BolusCommand.java b/app/src/main/java/de/jotomo/ruffyscripter/commands/BolusCommand.java
index 494595077e..d84023ef1e 100644
--- a/app/src/main/java/de/jotomo/ruffyscripter/commands/BolusCommand.java
+++ b/app/src/main/java/de/jotomo/ruffyscripter/commands/BolusCommand.java
@@ -26,7 +26,7 @@ public class BolusCommand implements Command {
     public List<String> validateArguments() {
         List<String> violations = new ArrayList<>();
 
-        if (bolus > 0 && bolus < 25) {
+        if (bolus <= 0 || bolus > 25) {
             violations.add("Requested bolus " + bolus + " out of limits (0-25)");
         }