diff --git a/src/zimlib/include/zim/endian.h b/src/zimlib/include/zim/endian.h
index ad2b238..27bf65f 100644
--- a/src/zimlib/include/zim/endian.h
+++ b/src/zimlib/include/zim/endian.h
@@ -24,6 +24,9 @@
 #include <iostream>
 #include <zim/zim.h>
 
+namespace zim
+{
+
 /// Returns true, if machine is big-endian (high byte first).
 /// e.g. PowerPC
 inline bool isBigEndian()
@@ -114,5 +117,7 @@ T fromBigEndian(const T* ptr, bool bigEndian = isBigEndian())
   }
 }
 
+}
+
 #endif // ENDIAN_H