diff --git a/Makefile b/Makefile
index fae07b1..1c9fa85 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ REQUIRED+=sinqMotor
 motorBase_VERSION=7.2.2
 
 # Specify the version of sinqMotor we want to build against
-sinqMotor_VERSION=0.13.0
+sinqMotor_VERSION=mathis_s
 
 # These headers allow to depend on this library for derived drivers.
 HEADERS += src/pmacAsynIPPort.h