diff --git a/doc/changes/drivers/mr.288.md b/doc/changes/drivers/mr.288.md
new file mode 100644
index 000000000..9e486adfd
--- /dev/null
+++ b/doc/changes/drivers/mr.288.md
@@ -0,0 +1,4 @@
+---
+- issue.69
+---
+psmv: Fix failure to build from source on PPC.
diff --git a/src/xrt/auxiliary/tracking/t_tracker_psmv_fusion.cpp b/src/xrt/auxiliary/tracking/t_tracker_psmv_fusion.cpp
index 191d6ea03..0ec3ad407 100644
--- a/src/xrt/auxiliary/tracking/t_tracker_psmv_fusion.cpp
+++ b/src/xrt/auxiliary/tracking/t_tracker_psmv_fusion.cpp
@@ -148,7 +148,7 @@ namespace {
 			reset_filter_and_imu();
 		}
 		// 7200 deg/sec
-		constexpr double max_rad_per_sec = 20 * EIGEN_PI * 2;
+		constexpr double max_rad_per_sec = 20 * double(EIGEN_PI) * 2;
 		if (filter_state.angularVelocity().squaredNorm() >
 		    max_rad_per_sec * max_rad_per_sec) {
 			fprintf(stderr,