diff --git a/slides/sysdev-hw-devices/sysdev-hw-devices.tex b/slides/sysdev-hw-devices/sysdev-hw-devices.tex
index 587320b18c..ce560169bc 100644
--- a/slides/sysdev-hw-devices/sysdev-hw-devices.tex
+++ b/slides/sysdev-hw-devices/sysdev-hw-devices.tex
@@ -351,7 +351,7 @@ \subsection{User-space interfaces to drivers}
   \end{itemize}
 \end{frame}
 
-\begin{frame}{Examples of user-space interface in {\tt /dev}}
+\begin{frame}{Examples of user-space interfaces in {\tt /dev}}
   \begin{itemize}
   \item Serial-ports: \code{/dev/ttyS*}, \code{/dev/ttyUSB*},
     \code{/dev/ttyACM*}, etc.