diff --git a/src/textord/cjkpitch.cpp b/src/textord/cjkpitch.cpp
index d4c9fd1bed..3726f28575 100644
--- a/src/textord/cjkpitch.cpp
+++ b/src/textord/cjkpitch.cpp
@@ -162,7 +162,7 @@ class LocalCorrelation {
       vote += values_[i].vote;
     }
 
-    return rc / vote;
+    return vote == 0 ? 0.0f : rc / vote;
   }
 
 private: