diff --git a/doc/usermanual/chapters/configuration.tex b/doc/usermanual/chapters/configuration.tex
index a37f81ae35d0c76f0bc6aea280599f4489589328..ec03745aebb6ad7c7380fe6216908a722d2e6f26 100644
--- a/doc/usermanual/chapters/configuration.tex
+++ b/doc/usermanual/chapters/configuration.tex
@@ -252,7 +252,7 @@ vector_of_doubles = 23.0, 45.6, 78.9
 \label{sec:detector_config}
 The detector configuration file consists of a set of sections that describe the detectors in the setup.
 Each section starts with a header describing the name used to identify the detector; all names are required to be unique.
-Every detector should contain all of the following parameters:
+Every detector can contain the following parameters:
 \begin{itemize}
 \item The \parameter{role} parameter is an array of strings indicating the function(s) of the respective detector. This can be \parameter{dut}, \parameter{reference} (\parameter{ref}), \parameter{auxiliary} (\parameter{aux}), \parameter{passive}, or \parameter{none}, where the latter is the default. With the default role, the respective detector participates in tracking but is neither used as reference plane for alignment and correlations, nor treated as DUT. In a reference role, the detector is used as anchor for relative alignments and its position and orientation is used for comparison when producing correlation and residual plots. As DUT, the detector is by default excluded from tracking, and all DUT-type modules are executed for this detector. As an auxiliary device, the detector may provide additional information but does not partake in the reconstruction. This is useful to e.g. include trigger logic units (TLUs) providing only timing information.With a passive role, detectors in the geometry do not get their own instances of detector modules and are not no data is loaded for them. They can, however, be used in tracking as scattering material.
 \begin{warning}