diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4182f0342d..2225d7fc34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,19 @@ cmake_minimum_required(VERSION 2.6)
 # Variable to check that people use the good file
 set(TOP_CMAKE_WAS_SOURCED TRUE)
 
+# Print a clear message that 64bits is not supported
+# It would avoid compilation failure later.
+if(CMAKE_SIZEOF_VOID_P MATCHES "8")
+    message(FATAL_ERROR "
+    PCSX2 does not support 64bits environment. Please install a 32bits chroot or a 32bits OS.
+    PCSX2 have neither no plan to support the 64bits architecture in the future.
+    It will need a complete rewrite of the core emulator and a lots of time
+    
+    However when linux distribution will support properly multi-arch package, it will 
+    be at least possible to easily compile and install PCSX2 witout too much hassle (the chroot environment)")
+endif(CMAKE_SIZEOF_VOID_P MATCHES "8")
+
+
 # set module path
 set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)