diff --git a/gnovm/pkg/gnolang/preprocess.go b/gnovm/pkg/gnolang/preprocess.go
index a4e5eb33fda..f5a3287890b 100644
--- a/gnovm/pkg/gnolang/preprocess.go
+++ b/gnovm/pkg/gnolang/preprocess.go
@@ -896,7 +896,7 @@ func Preprocess(store Store, ctx BlockNode, n Node) Node {
 						if lt.TypeID() != rt.TypeID() {
 							panic(fmt.Sprintf(
 								"incompatible types in binary expression: %v %v %v",
-								n.Left, n.Op, n.Right))
+								lt.TypeID(), n.Op, rt.TypeID()))
 						}
 						pt := go2GnoBaseType(lnt.Type).(PrimitiveType)
 						// convert n.Left to (gno) pt type,
@@ -935,7 +935,7 @@ func Preprocess(store Store, ctx BlockNode, n Node) Node {
 								if lt.TypeID() != rt.TypeID() {
 									panic(fmt.Sprintf(
 										"incompatible types in binary expression: %v %v %v",
-										n.Left, n.Op, n.Right))
+										lt.TypeID(), n.Op, rt.TypeID()))
 								}
 							} else {
 								checkOrConvertType(store, last, &n.Left, rt, false)
@@ -948,7 +948,7 @@ func Preprocess(store Store, ctx BlockNode, n Node) Node {
 								if lt.TypeID() != rt.TypeID() {
 									panic(fmt.Sprintf(
 										"incompatible types in binary expression: %v %v %v",
-										n.Left, n.Op, n.Right))
+										lt.TypeID(), n.Op, rt.TypeID()))
 								}
 							}
 						}
diff --git a/gnovm/pkg/gnolang/preprocess_test.go b/gnovm/pkg/gnolang/preprocess_test.go
index f577ce0d817..73dbb4dfc0e 100644
--- a/gnovm/pkg/gnolang/preprocess_test.go
+++ b/gnovm/pkg/gnolang/preprocess_test.go
@@ -30,11 +30,11 @@ func TestPrepocessBinaryExpressionPrimaryAndNative(t *testing.T) {
 	import "time"
 func main() {
 	var a int64 = 2
-	println(a * time.Second)
+	println(time.Second * a)
 	
 }`
 	n := MustParseFile("main.go", c)
-	assert.Panics(t, func() { m.RunFiles(n) }, "should panic: invalid operation: int64 * time.Duration")
+	assert.Panics(t, func() { m.RunFiles(n) })
 }
 
 func TestPrepocessBinaryExpressionNativeAndNative(t *testing.T) {
@@ -62,5 +62,5 @@ func main() {
 	
 }`
 	n := MustParseFile("main.go", c)
-	assert.Panics(t, func() { m.RunFiles(n) }, "should panic: invalid operation: time.Month * time.Weekday")
+	assert.Panics(t, func() { m.RunFiles(n) })
 }
diff --git a/gnovm/tests/files/time16_native.gno b/gnovm/tests/files/time16_native.gno
index 36fc7693d19..1789fcbef4f 100644
--- a/gnovm/tests/files/time16_native.gno
+++ b/gnovm/tests/files/time16_native.gno
@@ -11,4 +11,4 @@ func main() {
 }
 
 // Error:
-// main/files/time16_native.gno:10: incompatible types in binary expression: time<VPBlock(2,1)>.Second MUL a<VPBlock(1,0)>
+// main/files/time16_native.gno:10: incompatible types in binary expression: go:time.Duration MUL int64