diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 04a172f568..c40a3130fb 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -91,6 +91,12 @@ if( T8CODE_ENABLE_VTK )
 endif()
 
 if( T8CODE_ENABLE_OCC )
+    string (REGEX MATCH "^[0-9]+\\.[0-9]+"
+  T8CODE_OCC_VERSION_USED "${OCC_VERSION_STRING}")
+    # Define T8_OCC_VERSION_USED for internal and external use in source files.
+    # Note, external libraries linking against t8code (i.e. using find_package ( T8CODE REQUIRED )) can
+    # use T8_OCC_VERSION_USED in source code and T8CODE_OCC_VERSION_USED (defined in config.cmake.in) in their CMake scripts.
+    target_compile_definitions( T8 PUBLIC T8_OCC_VERSION_USED="${T8CODE_OCC_VERSION_USED}" )
     target_compile_definitions( T8 PUBLIC T8_ENABLE_OCC=1 )
     target_include_directories( T8 SYSTEM PUBLIC ${OpenCASCADE_INCLUDE_DIR} )
     target_link_libraries( T8 PUBLIC ${OpenCASCADE_LIBRARIES} )
diff --git a/src/config.cmake.in b/src/config.cmake.in
index c8fa76969b..aa6d1c2c11 100644
--- a/src/config.cmake.in
+++ b/src/config.cmake.in
@@ -13,6 +13,7 @@ set( T8CODE_BUILD_MESH_HANDLE @T8CODE_BUILD_MESH_HANDLE@ )
 
 set( T8CODE_ENABLE_MPI @T8CODE_ENABLE_MPI@ )
 set( T8CODE_ENABLE_VTK @T8CODE_ENABLE_VTK@ )
+set( T8CODE_ENABLE_OCC @T8CODE_ENABLE_OCC@ )
 
 set( T8CODE_USE_SYSTEM_SC @T8CODE_USE_SYSTEM_SC@ )
 set( T8CODE_USE_SYSTEM_P4EST @T8CODE_USE_SYSTEM_P4EST@ )
@@ -25,6 +26,13 @@ if(T8CODE_ENABLE_VTK)
     set (T8CODE_VTK_VERSION_USED "@T8CODE_VTK_VERSION_USED@")
 endif()
 
+if (T8CODE_ENABLE_OCC)
+    find_dependency(OpenCASCADE)
+    # Expose the variable T8CODE_OCC_VERSION_USED to external CMake scripts linking against t8code
+    # for example with find_package ( T8CODE REQUIRED )
+    set (T8CODE_OCC_VERSION_USED "@T8CODE_OCC_VERSION_USED@")
+endif()
+
 include( "${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake" )
 
 check_required_components( @PROJECT_NAME@ )
diff --git a/test/t8_gtest_occ_linkage.cxx b/test/t8_gtest_occ_linkage.cxx
index 1ab115ae4f..93788331e2 100644
--- a/test/t8_gtest_occ_linkage.cxx
+++ b/test/t8_gtest_occ_linkage.cxx
@@ -31,16 +31,44 @@
 #include <gtest/gtest.h>
 #if T8_ENABLE_OCC
 #include <gp_Pnt.hxx>
+#include <Standard_Version.hxx>
 #endif
 
-/* Check whether we can successfully execute VTK code */
-TEST (t8_test_occ_linkage, test_gp_Pnt)
+/* Test correct macro dependencies.
+ * Will throw a compile time error if T8_OCC_VERSION_USED
+ * is defined but T8_ENABLE_OCC is not. */
+#ifndef T8_ENABLE_OCC
+#ifdef T8_OCC_VERSION_USED
+#error Configuration error: T8_OCC_VERSION_USED is defined despite \
+ T8_ENABLE_OCC not being defined.
+#endif
+#endif
+
+/* Check whether T8_OCC_VERSION_USED equals OCC_VERSION_STRING */
+TEST (t8_gtest_occ_linkage, t8_test_occ_version_number)
 {
 #if T8_ENABLE_OCC
+  /* Compare the macro generated at configuration time with the linked compile time string */
+  ASSERT_FALSE (strcmp (T8_OCC_VERSION_USED, OCC_VERSION_STRING))
+    << "Linked OCC version (" << OCC_VERSION_STRING << ") does not equal the version t8code was configured with ("
+    << T8_OCC_VERSION_USED << ").\n";
+
+  if (!strcmp (T8_OCC_VERSION_USED, OCC_VERSION_STRING)) {
+    t8_debugf ("Using OCC version %s.\n", OCC_VERSION_STRING);
+  }
+#endif
+}
 
-  EXPECT_NO_THROW (gp_Pnt pnt = gp_Pnt (); pnt.SetX (1););
-  t8_global_productionf ("Successfully created occ gp_Pnt object.\n");
+/* Check whether we can successfully execute OCC code */
+TEST (t8_gtest_occ_linkage, test_gp_Pnt)
+{
+#if T8_ENABLE_OCC
+  EXPECT_NO_THROW ({
+    gp_Pnt pnt = gp_Pnt ();
+    pnt.SetX (1);
+  });
+  t8_debugf ("Successfully created occ gp_Pnt object.\n");
 #else
-  t8_global_productionf ("This version of t8code is not compiled with occ support.\n");
+  t8_debugf ("This version of t8code is not compiled with occ support.\n");
 #endif
 }