diff --git a/runtime.c b/runtime.c
index 5f62c349..26e58082 100644
--- a/runtime.c
+++ b/runtime.c
@@ -78,16 +78,16 @@ void Cyc_check_bounds(void *data, const char *label, int len, int index) {
 /* These macros are hardcoded here to support functions in this module. */
 #define closcall1(td,clo,a1) if (type_of(clo) == cons_tag || prim(clo)) { Cyc_apply(td,0, (closure)(a1), clo); } else { ((clo)->fn)(td,1,clo,a1);}
 /* Return to continuation after checking for stack overflow. */
-#define return_closcall1(td,clo,a1) \
-{char top; \
+#define return_closcall1(td,clo,a1) { \
+ char top; \
  if (stack_overflow(&top,(((gc_thread_data *)data)->stack_limit))) { \
      object buf[1]; buf[0] = a1;\
      GC(td,clo,buf,1); return; \
  } else {closcall1(td,(closure) (clo),a1); return;}}
 #define closcall2(td,clo,a1,a2) if (type_of(clo) == cons_tag || prim(clo)) { Cyc_apply(td,1, (closure)(a1), clo,a2); } else { ((clo)->fn)(td,2,clo,a1,a2);}
 /* Return to continuation after checking for stack overflow. */
-#define return_closcall2(td,clo,a1,a2) \
-{char top; \
+#define return_closcall2(td,clo,a1,a2) { \
+ char top; \
  if (stack_overflow(&top,(((gc_thread_data *)data)->stack_limit))) { \
      object buf[2]; buf[0] = a1;buf[1] = a2;\
      GC(td,clo,buf,2); return; \