diff --git a/whisper.cpp b/whisper.cpp
index 5da6760..f1985a4 100644
--- a/whisper.cpp
+++ b/whisper.cpp
@@ -3387,8 +3387,8 @@ static int timestamp_to_sample(int64_t t, int n_samples) {
     return std::max(0, std::min((int) n_samples - 1, (int) ((t*WHISPER_SAMPLE_RATE)/100)));
 }
 
-static int64_t sample_to_timestamp(int64_t i_sample) {
-    return (100*i_sample)/WHISPER_SAMPLE_RATE;
+static int64_t sample_to_timestamp(int i_sample) {
+    return (100ll*i_sample)/WHISPER_SAMPLE_RATE;
 }
 
 // a cost-function / heuristic that is high for text that takes longer to pronounce