diff --git a/CMakeLists.txt b/CMakeLists.txt
index bdb69f7485..21e7d2c0de 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -342,6 +342,19 @@ if (GNC_SRFI64_RESULT EQUAL 0)
   set (HAVE_SRFI64 TRUE)
 endif ()
 
+# Test that guile has guile-json.
+execute_process (COMMAND ${GUILE_EXECUTABLE} -c "(use-modules (json builder) (json parser) (json syntax))"
+  RESULT_VARIABLE GNC_GUILE_JSON
+  ERROR_QUIET
+)
+
+if (GNC_GUILE_JSON EQUAL 0)
+  message (STATUS "guile-json is present.")
+  set (HAVE_GUILE_JSON TRUE)
+else ()
+  message (FATAL_ERROR "guile-json cannot be imported. Abort.")
+endif ()
+
 # ############################################################
 IF (WITH_AQBANKING)
   GNC_PKG_CHECK_MODULES (GWENHYWFAR REQUIRED gwenhywfar)