diff --git a/functions/miscellaneous/singleGArun.m b/functions/miscellaneous/singleGArun.m
index 7ec2063f2567ac38f4814c59eb3ce0c2e8f921b0..483a62aedc08a4194fa49a52c0c6a59e30f961d8 100644
--- a/functions/miscellaneous/singleGArun.m
+++ b/functions/miscellaneous/singleGArun.m
@@ -169,6 +169,9 @@ for i = 1:nAz
     indexBeta = find(betaExit(i) == input.fltcon.BETA);
     launchpad.indexAlpha(i) = indexAlpha-1;
     launchpad.indexBeta(i) = indexBeta;
+
+    launchpad.indexAlpha(launchpad.indexAlpha <= 0) = 1;
+    launchpad.indexBeta(launchpad.indexBeta <= 0) = 1;
 end
 [c, ~] = XCPcheck(x, input, data_opt, launchpad, rocket, environment, settings);