diff --git a/SSAccessibility/SSSpeechSynthesizer.m b/SSAccessibility/SSSpeechSynthesizer.m
index e800dd9..68322ad 100644
--- a/SSAccessibility/SSSpeechSynthesizer.m
+++ b/SSAccessibility/SSSpeechSynthesizer.m
@@ -84,6 +84,11 @@ - (void)enqueueLineForSpeaking:(NSString *)line {
     }
     
     dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.speakResetTimer) {
+            [self.speakResetTimer invalidate];
+            _speakResetTimer = nil;
+        }
+        
         [self.speechQueue addObject:line];
         [self _maybeDequeueLine];
     });
@@ -155,6 +160,7 @@ - (void)voiceOverDidFinishAnnouncing:(NSNotification *)note {
     
     if (self.speakResetTimer) {
         [self.speakResetTimer invalidate];
+        _speakResetTimer = nil;
     }
     
     NSDictionary *userInfo = [note userInfo];