diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0025fd501..2468f2fd2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,8 +45,8 @@ else()
     add_compile_options(-Wno-gnu-zero-variadic-macro-arguments)
   endif()
   if(SANITIZERS)
-    set(SAN_FLAGS -fsanitize=shift -fsanitize=integer-divide-by-zero
-                  -fsanitize=unreachable -fsanitize=vla-bound
+    set(SAN_FLAGS -fsanitize=shift -fsanitize=integer-divide-by-zero -fsanitize=leak
+                  -fsanitize=undefined -fsanitize=unreachable -fsanitize=vla-bound
                   -fsanitize=signed-integer-overflow -fsanitize=bounds
                   -fsanitize=object-size -fsanitize=bool -fsanitize=enum
                   -fsanitize=alignment -fsanitize=null -fsanitize=address)
diff --git a/Makefile b/Makefile
index 8f52ef433..4ab4a6cf2 100644
--- a/Makefile
+++ b/Makefile
@@ -207,8 +207,8 @@ develop:
 		-Wno-format-nonliteral -Wno-strict-overflow -Wno-unused-but-set-variable \
 		-Wno-type-limits -Wno-tautological-constant-out-of-range-compare -Wvla \
 		-D_GLIBCXX_ASSERTIONS \
-		-fsanitize=shift -fsanitize=integer-divide-by-zero \
-		-fsanitize=unreachable -fsanitize=vla-bound \
+		-fsanitize=shift -fsanitize=integer-divide-by-zero -fsanitize=leak \
+		-fsanitize=undefined -fsanitize=unreachable -fsanitize=vla-bound \
 		-fsanitize=signed-integer-overflow -fsanitize=bounds \
 		-fsanitize=object-size -fsanitize=bool -fsanitize=enum \
 		-fsanitize=alignment -fsanitize=null -fsanitize=address" \