diff --git a/src/fileFormats/ensight/read/ensightReadFile.C b/src/fileFormats/ensight/read/ensightReadFile.C
index 846a77d11d..5a6ba00137 100644
--- a/src/fileFormats/ensight/read/ensightReadFile.C
+++ b/src/fileFormats/ensight/read/ensightReadFile.C
@@ -68,7 +68,7 @@ Foam::ensightReadFile::detectBinaryHeader(const fileName& pathname)
         if
         (
             (buf.find("Binary") == std::string::npos)
-         || (buf.find("binary") == std::string::npos)
+         && (buf.find("binary") == std::string::npos)
         )
         {
             fmt = IOstreamOption::ASCII;