diff --git a/driver/level3/level3_gemm3m_thread.c b/driver/level3/level3_gemm3m_thread.c
index 21d431b60..9216daaed 100644
--- a/driver/level3/level3_gemm3m_thread.c
+++ b/driver/level3/level3_gemm3m_thread.c
@@ -104,7 +104,7 @@ typedef struct {
 #define BETA_OPERATION(M_FROM, M_TO, N_FROM, N_TO, BETA, C, LDC) \
 	GEMM_BETA((M_TO) - (M_FROM), (N_TO - N_FROM), 0, \
 		  BETA[0], BETA[1], NULL, 0, NULL, 0, \
-		  (FLOAT *)(C) + (M_FROM) + (N_FROM) * (LDC) * COMPSIZE, LDC)
+		  (FLOAT *)(C) + ((M_FROM) + (N_FROM) * (LDC)) * COMPSIZE, LDC)
 #endif
 
 #ifndef ICOPYB_OPERATION
@@ -414,7 +414,7 @@ static int inner_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n,
 
       for(jjs = xxx; jjs < MIN(n_to, xxx + div_n); jjs += min_jj){
 	min_jj = MIN(n_to, xxx + div_n) - jjs;
-	if (min_jj > GEMM3M_UNROLL_N) min_jj = GEMM3M_UNROLL_N;
+	if (min_jj > GEMM3M_UNROLL_N*3) min_jj = GEMM3M_UNROLL_N*3;
 
 	START_RPCC();
 
@@ -550,7 +550,7 @@ static int inner_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n,
 
       for(jjs = xxx; jjs < MIN(n_to, xxx + div_n); jjs += min_jj){
 	min_jj = MIN(n_to, xxx + div_n) - jjs;
-	if (min_jj > GEMM3M_UNROLL_N) min_jj = GEMM3M_UNROLL_N;
+	if (min_jj > GEMM3M_UNROLL_N*3) min_jj = GEMM3M_UNROLL_N*3;
 
 	START_RPCC();
 
@@ -687,7 +687,7 @@ static int inner_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n,
 
       for(jjs = xxx; jjs < MIN(n_to, xxx + div_n); jjs += min_jj){
 	min_jj = MIN(n_to, xxx + div_n) - jjs;
-	if (min_jj > GEMM3M_UNROLL_N) min_jj = GEMM3M_UNROLL_N;
+	if (min_jj > GEMM3M_UNROLL_N*3) min_jj = GEMM3M_UNROLL_N*3;
 
 	START_RPCC();