diff --git a/rtl/z_dsp/mult_C.v b/rtl/z_dsp/mult_C.v
index 3323dd8..36b83f6 100644
--- a/rtl/z_dsp/mult_C.v
+++ b/rtl/z_dsp/mult_C.v
@@ -103,7 +103,7 @@ trunc #(
 	 .diw	(A_width+C_width+1		)
 	,.msb	(A_width+C_width-2		)
 	,.lsb	(A_width+C_width-o_width-1	)
-) u_round1 (clk, rstn, en, Re_tmp, Re_trunc);
+) u_round1 (clk, rstn, en, Im_tmp, Re_trunc);
 trunc #(
 	 .diw	(A_width+D_width+1		)
 	,.msb	(A_width+D_width-2		)