diff --git a/src/platforms/posix/drivers/accelsim/accelsim.cpp b/src/platforms/posix/drivers/accelsim/accelsim.cpp
index 481eb57788..dfd0eadb3f 100644
--- a/src/platforms/posix/drivers/accelsim/accelsim.cpp
+++ b/src/platforms/posix/drivers/accelsim/accelsim.cpp
@@ -75,7 +75,7 @@
 
 #define DIR_READ				(1<<7)
 #define DIR_WRITE				(0<<7)
-#define ACC_READ 				(0<<6)
+#define ACC_READ 				(1<<5)
 #define MAG_READ 				(1<<6)
 
 extern "C" { __EXPORT int accelsim_main(int argc, char *argv[]); }