diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@
 find_package(QRencode)
 set_package_properties(QRencode PROPERTIES TYPE REQUIRED)
 find_package(Dmtx)
-set_package_properties(Dmtx PROPERTIES TYPE REQUIRED)
+set_package_properties(Dmtx PROPERTIES TYPE RECOMMENDED)
 
 if (Qt5_POSITION_INDEPENDENT_CODE)
   set(CMAKE_POSITION_INDEPENDENT_CODE ON)
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -1,16 +1,22 @@
 include(CMakePackageConfigHelpers)
+if(TARGET Dmtx::Dmtx)
+    set(HAVE_DMTX 1)
+endif()
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config-prison.h.in ${CMAKE_CURRENT_BINARY_DIR}/config-prison.h)
 
 set(prison_SRCS
     abstractbarcode.cpp
     aztecbarcode.cpp
     bitvector.cpp
     code39barcode.cpp
     code93barcode.cpp
-    datamatrixbarcode.cpp
     qrcodebarcode.cpp
     prison.cpp
     reedsolomon.cpp
 )
+if(TARGET Dmtx::Dmtx)
+    list(APPEND prison_SRCS datamatrixbarcode.cpp)
+endif()
 
 ecm_qt_declare_logging_category(prison_SRCS HEADER prison_debug.h IDENTIFIER Prison::Log CATEGORY_NAME kf5.prison)
 add_library(KF5Prison ${prison_SRCS})
@@ -26,9 +32,11 @@
 PUBLIC
    Qt5::Gui
 PRIVATE
-   Dmtx::Dmtx
    QRencode::QRencode
 )
+if(TARGET Dmtx::Dmtx)
+    target_link_libraries(KF5Prison PRIVATE Dmtx::Dmtx)
+endif()
 
 set_target_properties(KF5Prison PROPERTIES
     VERSION ${PRISON_VERSION_STRING}
diff --git a/src/lib/prison.cpp b/src/lib/config-prison.h.in
copy from src/lib/prison.cpp
copy to src/lib/config-prison.h.in
--- a/src/lib/prison.cpp
+++ b/src/lib/config-prison.h.in
@@ -1,5 +1,5 @@
 /*
-    Copyright (c) 2010-2016 Sune Vuorela <sune@vuorela.dk>
+    Copyright (c) 2018 Volker Krause <vkrause@kde.org>
 
     Permission is hereby granted, free of charge, to any person
     obtaining a copy of this software and associated documentation
@@ -21,33 +21,11 @@
     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     OTHER DEALINGS IN THE SOFTWARE.
-
 */
 
-#include "prison.h"
-#include "aztecbarcode.h"
-#include "datamatrixbarcode.h"
-#include "qrcodebarcode.h"
-#include "code39barcode.h"
-#include "code93barcode.h"
+#ifndef PRISON_CONFIG_H
+#define PRISON_CONFIG_H
 
-Prison::AbstractBarcode *Prison::createBarcode(BarcodeType type)
-{
-    switch(type)
-    {
-        case Prison::Null:
-            return nullptr;
-        case Prison::QRCode:
-            return new QRCodeBarcode;
-        case Prison::DataMatrix:
-            return new DataMatrixBarcode;
-        case Prison::Aztec:
-            return new AztecBarcode;
-        case Prison::Code39:
-            return new Code39Barcode;
-        case Prison::Code93:
-            return new Code93Barcode;
-    }
-    return nullptr;
+#cmakedefine HAVE_DMTX
 
-}
+#endif
diff --git a/src/lib/prison.cpp b/src/lib/prison.cpp
--- a/src/lib/prison.cpp
+++ b/src/lib/prison.cpp
@@ -24,6 +24,7 @@
 
 */
 
+#include <config-prison.h>
 #include "prison.h"
 #include "aztecbarcode.h"
 #include "datamatrixbarcode.h"
@@ -40,7 +41,11 @@
         case Prison::QRCode:
             return new QRCodeBarcode;
         case Prison::DataMatrix:
+#ifdef HAVE_DMTX
             return new DataMatrixBarcode;
+#else
+            return nullptr;
+#endif
         case Prison::Aztec:
             return new AztecBarcode;
         case Prison::Code39: