diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6adcb7c..4b03700 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -126,16 +126,16 @@ set(ALLOWED_stacksan    0)
 set(ALLOWED_dataflowsan 0)
 set(ALLOWED_cfisan      0)
 set(ALLOWED_kcfisan     0)
-if(NOT WIN32 OR NOT BUILD_ASAN OR NOT BUILD_SAN)
+if(NOT WIN32 AND (BUILD_ASAN OR BUILD_SAN))
   set(ALLOWED_asan      1)
 endif()
-if(IS_CC_CLANG OR NOT BUILD_MSAN OR NOT BUILD_SAN)
+if(IS_CC_CLANG AND (BUILD_MSAN OR BUILD_SAN))
   set(ALLOWED_msan      1)
 endif()
-if(NOT ANDROID OR NOT WIN32 OR NOT BUILD_TSAN OR NOT BUILD_SAN)
+if(NOT ANDROID AND NOT WIN32 AND (BUILD_TSAN OR BUILD_SAN))
   set(ALLOWED_tsan      1)
 endif()
-if(NOT WIN32 OR NOT BUILD_UBSAN OR NOT BUILD_SAN)
+if(NOT WIN32 AND (BUILD_UBSAN OR BUILD_SAN))
   set(ALLOWED_ubsan     1)
 endif()
 set(SAN_NAMES                       "asan" "msan" "tsan" "ubsan")
@@ -332,10 +332,8 @@ function(wtr_add_autosan_bin_target NAME SRC_SET IS_TEST)
   endif()
   foreach(SAN ${SAN_NAMES})
     string(TOUPPER ${SAN} UPPER_SAN)
-    if(NOT BUILD_SAN)
-      message(STATUS "${NAME}.${SAN}: Skipped (BUILD_SAN=${BUILD_SAN})")
-    elseif(NOT BUILD_${UPPER_SAN})
-      message(STATUS "${NAME}.${SAN}: Skipped (BUILD_${UPPER_SAN}=${BUILD_${UPPER_SAN}})")
+    if(NOT BUILD_SAN AND NOT BUILD_${UPPER_SAN})
+      message(STATUS "${NAME}.${SAN}: Skipped (BUILD_SAN=${BUILD_SAN}, BUILD_${UPPER_SAN}=${BUILD_${UPPER_SAN}})")
     elseif(NOT ALLOWED_${SAN})
       message(STATUS "${NAME}.${SAN}: Skipped (Unsupported on ${CMAKE_SYSTEM}/${CMAKE_CXX_COMPILER_ID})")
     elseif(IS_TEST)
@@ -351,11 +349,8 @@ function(wtr_add_san_lib_target NAME OUTPUT_NAME SRC_SET INC_SET LIB_TYPE SAN)
   if (NOT BUILD_LIB)
     message(STATUS "${NAME}: Skipped (BUILD_LIB=${BUILD_LIB})")
     return()
-  elseif (NOT BUILD_SAN)
-    message(STATUS "${NAME}: Skipped (BUILD_SAN=${BUILD_SAN})")
-    return()
-  elseif (NOT BUILD_${UPPER_SAN})
-    message(STATUS "${NAME}: Skipped (BUILD_${UPPER_SAN}=${BUILD_${UPPER_SAN}})")
+  elseif (NOT BUILD_SAN AND NOT BUILD_${UPPER_SAN})
+    message(STATUS "${NAME}: Skipped (BUILD_SAN=${BUILD_SAN}, BUILD_${UPPER_SAN}=${BUILD_${UPPER_SAN}})")
     return()
   elseif (NOT ALLOWED_${SAN})
     message(STATUS "${NAME}: Skipped (Unsupported on ${CMAKE_SYSTEM}/${CMAKE_CXX_COMPILER_ID})")