diff --git a/ppdet/data/source/roidb_source.py b/ppdet/data/source/roidb_source.py
index 7d42e87b898010235f794ffdc3d6b3e4ee2adc24..4d898d95158d6e7747b13d459670b20598dea46b 100644
--- a/ppdet/data/source/roidb_source.py
+++ b/ppdet/data/source/roidb_source.py
@@ -28,6 +28,9 @@ import copy
 import pickle as pkl
 from ..dataset import Dataset
 
+import logging
+logger = logging.getLogger(__name__)
+
 
 class RoiDbSource(Dataset):
     """ interface to load roidb data from files
@@ -134,6 +137,11 @@ class RoiDbSource(Dataset):
         if self._is_shuffle:
             random.shuffle(self._roidb)
 
+        if self._mixup_epoch > 0 and self._samples < 2:
+            logger.info("Disable mixup for dataset samples "
+                        "less than 2 samples")
+            self._mixup_epoch = -1
+
         if self._epoch < 0:
             self._epoch = 0
         else: