diff --git a/pyqtgraph/SRTTransform3D.py b/pyqtgraph/SRTTransform3D.py
index 9b54843b..3c4edcc8 100644
--- a/pyqtgraph/SRTTransform3D.py
+++ b/pyqtgraph/SRTTransform3D.py
@@ -113,7 +113,7 @@ class SRTTransform3D(Transform3D):
     
     def setFromMatrix(self, m):
         """
-        Set this transform mased on the elements of *m*
+        Set this transform based on the elements of *m*
         The input matrix must be affine AND have no shear,
         otherwise the conversion will most likely fail.
         """