diff --git a/issue100_test.go b/issue100_test.go
new file mode 100644
index 0000000..3584024
--- /dev/null
+++ b/issue100_test.go
@@ -0,0 +1,17 @@
+package mergo
+
+import "testing"
+
+type issue100s struct {
+	Member interface{}
+}
+
+func TestIssue100(t *testing.T) {
+	m := make(map[string]interface{})
+	m["Member"] = "anything"
+
+	st := &issue100s{}
+	if err := Map(st, m); err != nil {
+		t.Error(err)
+	}
+}
diff --git a/merge.go b/merge.go
index c35fd53..b7fcf5e 100644
--- a/merge.go
+++ b/merge.go
@@ -226,7 +226,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 	case reflect.Ptr:
 		fallthrough
 	case reflect.Interface:
-		if src.IsNil() {
+		if isReflectNil(src) {
 			if overwriteWithEmptySrc && dst.CanSet() && src.Type().AssignableTo(dst.Type()) {
 				dst.Set(src)
 			}