diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
index 0892857e68..7b9fa6555a 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
@@ -3028,7 +3028,7 @@ void fam15EnableTrainingMode(struct MCTStatStruc *pMCTstat,
 		uint8_t lane;
 		uint8_t dimm;
 		uint16_t max_cdd_we_delta;
-		uint16_t cdd_trwtto_we_delta;
+		int16_t cdd_trwtto_we_delta;
 		uint8_t receiver;
 		uint8_t lane_count;
 		uint8_t x4_present = 0;