diff --git a/libafl/src/monitors/tui/ui.rs b/libafl/src/monitors/tui/ui.rs
index 8332fa9a53..3239a2cfd3 100644
--- a/libafl/src/monitors/tui/ui.rs
+++ b/libafl/src/monitors/tui/ui.rs
@@ -64,7 +64,10 @@ impl TuiUI {
     pub fn on_right(&mut self) {
         if self.clients != 0 {
             // clients_idx never 0
-            self.clients_idx = 1 + self.clients_idx % (self.clients - 1);
+            if self.clients - 1 != 0 {
+                // except for when it is ;)
+                self.clients_idx = 1 + self.clients_idx % (self.clients - 1);
+            }
         }
     }
 
@@ -73,7 +76,8 @@ impl TuiUI {
             // clients_idx never 0
             if self.clients_idx == 1 {
                 self.clients_idx = self.clients - 1;
-            } else {
+            } else if self.clients - 1 != 0 {
+                // don't wanna be dividing by 0
                 self.clients_idx = 1 + (self.clients_idx - 2) % (self.clients - 1);
             }
         }