diff --git a/m1/perf/sched.c b/m1/perf/sched.c
index ffe57c9..e7cc6db 100644
--- a/m1/perf/sched.c
+++ b/m1/perf/sched.c
@@ -315,14 +315,12 @@ static void mark(int vm_reg)
 static void init_registers(struct fpvm_fragment *frag,
     unsigned int *registers)
 {
-	size_t regs_size;
 	int i;
 
 	get_registers(frag, registers);
 
-	regs_size = sizeof(struct vm_reg)*(frag->nbindings-frag->next_sur);
-	sc->regs = malloc(regs_size);
-	memset(sc->regs, 0, regs_size);
+	sc->regs =
+	    calloc(frag->nbindings-frag->next_sur, sizeof(struct vm_reg));
 
 	for (i = 0; i != frag->ninstructions; i++) {
 		mark(frag->code[i].opa);
@@ -614,8 +612,7 @@ static int schedule(unsigned int *code)
 static void init_scheduler_context(struct fpvm_fragment *frag,
     unsigned int *reg)
 {
-	sc = malloc(sizeof(*sc));
-	memset(sc, 0, sizeof(*sc));
+	sc = calloc(1, sizeof(*sc));
 
 	sc->frag = frag;