diff --git a/test/gf16/CMakeLists.txt b/test/gf16/CMakeLists.txt
index c7a212c..2778b5b 100644
--- a/test/gf16/CMakeLists.txt
+++ b/test/gf16/CMakeLists.txt
@@ -59,6 +59,9 @@ endif()
 if(SLIM_GF16)
 	add_compile_definitions(PARPAR_SLIM_GF16=1)
 endif()
+if(ENABLE_SANITIZE)
+	add_compile_definitions(HAS_UBSAN=1)
+endif()
 
 set(GF16_DIR ../../gf16)
 set(SRC_DIR ../../src)
diff --git a/test/hasher/CMakeLists.txt b/test/hasher/CMakeLists.txt
index 5811f78..08e5d65 100644
--- a/test/hasher/CMakeLists.txt
+++ b/test/hasher/CMakeLists.txt
@@ -53,6 +53,9 @@ endif()
 if(ENABLE_MULTIMD5)
 	add_compile_definitions(PARPAR_ENABLE_HASHER_MULTIMD5=1)
 endif()
+if(ENABLE_SANITIZE)
+	add_compile_definitions(HAS_UBSAN=1)
+endif()
 
 set(HASHER_DIR ../../hasher)
 set(SRC_DIR ../../src)