diff --git a/src/cmd/5g/ggen.c b/src/cmd/5g/ggen.c
index 3243bb8634..bbcb7f728f 100644
--- a/src/cmd/5g/ggen.c
+++ b/src/cmd/5g/ggen.c
@@ -794,6 +794,8 @@ cgen_inline(Node *n, Node *res)
 		goto no;
 	if(!n->left->addable)
 		goto no;
+	if(n->left->sym == S)
+		goto no;
 	if(n->left->sym->pkg != runtimepkg)
 		goto no;
 	if(strcmp(n->left->sym->name, "slicearray") == 0)
diff --git a/src/cmd/6g/ggen.c b/src/cmd/6g/ggen.c
index 59a6d529dc..21b6237a31 100644
--- a/src/cmd/6g/ggen.c
+++ b/src/cmd/6g/ggen.c
@@ -1183,6 +1183,8 @@ cgen_inline(Node *n, Node *res)
 		goto no;
 	if(!n->left->addable)
 		goto no;
+	if(n->left->sym == S)
+		goto no;
 	if(n->left->sym->pkg != runtimepkg)
 		goto no;
 	if(strcmp(n->left->sym->name, "slicearray") == 0)
diff --git a/src/cmd/8g/ggen.c b/src/cmd/8g/ggen.c
index 8a55ffd598..e9a5454eb2 100644
--- a/src/cmd/8g/ggen.c
+++ b/src/cmd/8g/ggen.c
@@ -889,6 +889,8 @@ cgen_inline(Node *n, Node *res)
 		goto no;
 	if(!n->left->addable)
 		goto no;
+	if(n->left->sym == S)
+		goto no;
 	if(n->left->sym->pkg != runtimepkg)
 		goto no;
 	if(strcmp(n->left->sym->name, "slicearray") == 0)