diff --git a/src/OpenMesh/Core/System/config.h b/src/OpenMesh/Core/System/config.h
index b48b1536..e0d436e3 100644
--- a/src/OpenMesh/Core/System/config.h
+++ b/src/OpenMesh/Core/System/config.h
@@ -71,9 +71,9 @@
 // only defined, if it is a beta version
 //#define OM_VERSION_BETA 4
 
-#define OM_GET_VER ((OM_VERSION && 0xf0000) >> 16)
-#define OM_GET_MAJ ((OM_VERSION && 0x0ff00) >> 8)
-#define OM_GET_MIN  (OM_VERSION && 0x000ff)
+#define OM_GET_VER ((OM_VERSION & 0xf0000) >> 16)
+#define OM_GET_MAJ ((OM_VERSION & 0x0ff00) >> 8)
+#define OM_GET_MIN  (OM_VERSION & 0x000ff)
 
 #ifdef WIN32
 #  ifdef min