diff --git a/application/views/contesting/index.php b/application/views/contesting/index.php
index 6e4aff2d4..33c286cbe 100644
--- a/application/views/contesting/index.php
+++ b/application/views/contesting/index.php
@@ -236,7 +236,7 @@
                         </div>
 
                         <button type="button" class="mb-3 btn btn-sm btn-secondary" onclick="reset_log_fields()"><i class="fas fa-sync-alt"></i> <?= __("Reset QSO"); ?></button>
-                        <button type="button" class="mb-3 btn btn-sm btn-primary" onclick="logQso();"><i class="fas fa-save"></i> <?= __("Save QSO"); ?></button>
+                        <button type="button" class="mb-3 btn btn-sm btn-primary" onclick="logQso();" id="saveQso"><i class="fas fa-save"></i> <?= __("Save QSO"); ?></button>
                     </form>
                 </div>
             </div>
diff --git a/assets/js/sections/contesting.js b/assets/js/sections/contesting.js
index b17bd8772..018ee70e9 100644
--- a/assets/js/sections/contesting.js
+++ b/assets/js/sections/contesting.js
@@ -650,6 +650,10 @@ function logQso() {
 		// Only "Start a new contest session" will enable it again
 		disabledContestnameSelect(true);
 
+		// Avoid resubmission by disabling the button
+		var saveQsoButtonText = $("#saveQso").html();
+		$("#saveQso").html('<span class="spinner-border spinner-border-sm me-1" role="status" aria-hidden="true"></span> ' + saveQsoButtonText + '...').prop('disabled', true);
+
 		$('.callsign-suggestions').text("");
 		$('#callsign_info').text("");
 
@@ -747,6 +751,8 @@ function logQso() {
 				var qTable = $('.qsotable').DataTable();
 				qTable.search('').order([0, 'desc']).draw();
 
+				// Re-enable the previously disabled button for resubmission avoidance
+				$("#saveQso").html(saveQsoButtonText).prop("disabled", false);
 			}
 		});
 	}