diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index c64d1032a4..7262cdb4b3 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -2110,8 +2110,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     if (sconf->floating) {
         ctx->acf               = av_malloc_array(channels, sizeof(*ctx->acf));
-        ctx->shift_value       = av_malloc_array(channels, sizeof(*ctx->shift_value));
-        ctx->last_shift_value  = av_malloc_array(channels, sizeof(*ctx->last_shift_value));
+        ctx->shift_value       = av_calloc(channels, sizeof(*ctx->shift_value));
+        ctx->last_shift_value  = av_calloc(channels, sizeof(*ctx->last_shift_value));
         ctx->last_acf_mantissa = av_malloc_array(channels, sizeof(*ctx->last_acf_mantissa));
         ctx->raw_mantissa      = av_calloc(channels, sizeof(*ctx->raw_mantissa));