diff --git a/common/frame.c b/common/frame.c
index 85bbcc0..5538733 100644
--- a/common/frame.c
+++ b/common/frame.c
@@ -158,6 +158,7 @@ void x264_frame_delete( x264_frame_t *frame )
         }
     x264_free( frame->f_qp_offset );
     x264_free( frame->i_intra_cost );
+    x264_free( frame->i_inv_qscale_factor );
     x264_free( frame->i_row_bits );
     x264_free( frame->i_row_qp );
     x264_free( frame->mb_type );