diff --git a/cmake/Modules/opm-autodiff-prereqs.cmake b/cmake/Modules/opm-autodiff-prereqs.cmake
index 650e533c1..86fad9a34 100644
--- a/cmake/Modules/opm-autodiff-prereqs.cmake
+++ b/cmake/Modules/opm-autodiff-prereqs.cmake
@@ -19,5 +19,5 @@ set (opm-autodiff_DEPS
 	dune-istl REQUIRED;
 	opm-core REQUIRED"
 	# Eigen
-	"Eigen3 3.1 REQUIRED"
+	"Eigen3 3.1.2 "
 	)