diff --git a/source/text_handler.cpp b/source/text_handler.cpp
index 5f6e8c4..c31f34a 100644
--- a/source/text_handler.cpp
+++ b/source/text_handler.cpp
@@ -313,7 +313,7 @@
   pInst->words.back() = 0;
 
   char* dest = (char*)&pInst->words[oldWordCount];
-  strncpy(dest, value, length);
+  strncpy(dest, value, length + 1);
 
   return SPV_SUCCESS;
 }