diff --git a/src/osgPlugins/ive/DataInputStream.cpp b/src/osgPlugins/ive/DataInputStream.cpp
index f696fcd0b..49e9da7cb 100644
--- a/src/osgPlugins/ive/DataInputStream.cpp
+++ b/src/osgPlugins/ive/DataInputStream.cpp
@@ -72,7 +72,7 @@ bool DataInputStream::readBool(){
     _istream->read(&c, CHARSIZE);
     if (_istream->rdstate() & _istream->failbit)
         throw Exception("DataInputStream::readBool(): Failed to read boolean value.");
-    return c;
+    return c!=0;
 }
 
 char DataInputStream::readChar(){