diff --git a/ci/cmake-preloads/config-oss-fuzz.cmake b/ci/cmake-preloads/config-oss-fuzz.cmake
index 36c182a36..05d04e452 100644
--- a/ci/cmake-preloads/config-oss-fuzz.cmake
+++ b/ci/cmake-preloads/config-oss-fuzz.cmake
@@ -1,6 +1,6 @@
 message("PRELOADING cache")
 set (CMAKE_VERBOSE_MAKEFILE ON CACHE BOOL "preload")
-set (WITH_VERBOSE_WINPR_ASSERT OFF CACHE BOOL "oss fuzz")
+set (WITH_VERBOSE_WINPR_ASSERT ON CACHE BOOL "oss fuzz")
 
 set (WITH_SERVER ON CACHE BOOL "oss fuzz")
 set (WITH_SAMPLE OFF CACHE BOOL "oss fuzz")