diff --git a/libretro-common/audio/dsp_filters/iir.c b/libretro-common/audio/dsp_filters/iir.c
index 2f1a6451f7..956f01651e 100644
--- a/libretro-common/audio/dsp_filters/iir.c
+++ b/libretro-common/audio/dsp_filters/iir.c
@@ -223,7 +223,8 @@ static void iir_filter_init(struct iir_data *iir,
       case RIAA_phono: /* http://www.dsprelated.com/showmessage/73300/3.php */
       {
          double y, b_re, a_re, b_im, a_im, g;
-         float b[3], a[3];
+         float b[3] = {0.0f};
+         float a[3] = {0.0f};
 
          if ((int)sample_rate == 44100)
          {