diff --git a/src/libFLAC/stream_encoder.c b/src/libFLAC/stream_encoder.c
index 290d038c..4045189f 100644
--- a/src/libFLAC/stream_encoder.c
+++ b/src/libFLAC/stream_encoder.c
@@ -3784,7 +3784,7 @@ void precompute_partition_info_sums_(
 		/* slightly pessimistic but still catches all common cases */
 		/* WATCHOUT: "+ bps" is an assumption that the average residual magnitude will not be more than "bps" bits */
 		if(FLAC__bitmath_ilog2(default_partition_samples) + bps < 32) {
-			FLAC__uint32 abs_residual_partition_sum;
+			FLAC__uint64 abs_residual_partition_sum;
 
 			for(partition = residual_sample = 0; partition < partitions; partition++) {
 				end += default_partition_samples;