diff --git a/core/metrics/__init__.py b/core/metrics/__init__.py
index 23fd64e7ac281f4521ce9b6ea3cb7d6d465e5a17..0814e5a767f33b78ac63e463ce1f9171b918f478 100755
--- a/core/metrics/__init__.py
+++ b/core/metrics/__init__.py
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from precision import Precision
+from .precision import Precision
 
 __all__ = ['Precision']