diff --git a/interp/eval.go b/interp/eval.go
index 25a859d..749e6e4 100644
--- a/interp/eval.go
+++ b/interp/eval.go
@@ -2,7 +2,6 @@ package interp
 
 import (
 	"fmt"
-	"unsafe"
 )
 
 var debug bool = false
@@ -60,7 +59,7 @@ func (p *process_t) merge_top_values() error {
 	new_val = *v1 + *v2
 	p.vsp--
 	p.vstack[p.vsp] = nil
-	p.vstack[p.vsp-1] = unsafe.Pointer(&new_val)
+	p.vstack[p.vsp-1] = &new_val
 	p.ctx.count--
 
 	if debug {
@@ -121,6 +120,10 @@ func (p *process_t) GetNumArgs() int {
 	return p.ctx.count - 2
 }
 
+func (p *process_t) ReturnString(val string) {
+	p.vstack[p.vsp-p.ctx.count] = &val
+}
+
 func (p *process_t) Return(val Value_t) {
 	p.vstack[p.vsp-p.ctx.count] = val
 }
@@ -178,7 +181,7 @@ func (interp *Interp) dump_vstack(p *process_t) {
 			}*/
 		switch t := p.vstack[i].(type) {
 		case *string:
-			fmt.Printf(" %d => [%s]\n", i, t)
+			fmt.Printf(" %d => [%s]\n", i, *t)
 		case *Cnode_t:
 			fmt.Printf(" %d => ", i)
 			interp.dump_cnodes(t, false)
diff --git a/interp/proc.go b/interp/proc.go
index 16a3960..5116091 100644
--- a/interp/proc.go
+++ b/interp/proc.go
@@ -74,22 +74,22 @@ func proc_puts(p *process_t) error {
 	if nargs >= 1 {
 		p.Return(v)
 	} else {
-		p.Return("hello")
+		p.ReturnString("hello")
 	}
 	return nil
 }
 
 func proc_false(p *process_t) error {
-	p.Return("false")
+	p.ReturnString("false")
 	return nil
 }
 func proc_true(p *process_t) error {
-	p.Return("true")
+	p.ReturnString("true")
 	return nil
 }
 
 func proc_null(p *process_t) error {
-	p.Return("")
+	p.ReturnString("")
 	return nil
 }