diff --git a/src/cmd/6c/cgen.c b/src/cmd/6c/cgen.c
index 95400c44535..7afacb21778 100644
--- a/src/cmd/6c/cgen.c
+++ b/src/cmd/6c/cgen.c
@@ -392,13 +392,13 @@ cgen(Node *n, Node *nn)
 			}
 		}
 
-		if(o == OMUL) {
+		if(o == OMUL || o == OLMUL) {
 			if(l->addable >= INDEXED) {
 				t = l;
 				l = r;
 				r = t;
 			}
-			/* should favour AX */
+			reg[D_DX]++; // for gopcode case OMUL
 			regalloc(&nod, l, nn);
 			cgen(l, &nod);
 			if(r->addable < INDEXED || hardconst(r)) {
@@ -410,6 +410,7 @@ cgen(Node *n, Node *nn)
 				gopcode(OMUL, n->type, r, &nod);	/* addressible */
 			gmove(&nod, nn);
 			regfree(&nod);
+			reg[D_DX]--;
 			break;
 		}
 
diff --git a/src/cmd/8c/cgen.c b/src/cmd/8c/cgen.c
index 78eb7ecedb3..4d4ae13abee 100644
--- a/src/cmd/8c/cgen.c
+++ b/src/cmd/8c/cgen.c
@@ -404,13 +404,13 @@ cgen(Node *n, Node *nn)
 			}
 		}
 
-		if(o == OMUL) {
+		if(o == OMUL || o == OLMUL) {
 			if(l->addable >= INDEXED) {
 				t = l;
 				l = r;
 				r = t;
 			}
-			/* should favour AX */
+			reg[D_DX]++; // for gopcode case OMUL
 			regalloc(&nod, l, nn);
 			cgen(l, &nod);
 			if(r->addable < INDEXED) {
@@ -422,6 +422,7 @@ cgen(Node *n, Node *nn)
 				gopcode(OMUL, n->type, r, &nod);	/* addressible */
 			gmove(&nod, nn);
 			regfree(&nod);
+			reg[D_DX]--;
 			break;
 		}