diff --git a/wscript b/wscript
index 42097085..ca3c4cd5 100644
--- a/wscript
+++ b/wscript
@@ -117,17 +117,26 @@ def configure(ctx):
 
   ctx.load('compiler_cxx')
   cxxflags = ['-g', '-std=c++11', '-Wall', '-Wno-sign-compare', '-Werror']
+  ldflags = []
   # /Zi: -g, /WX: -Werror, /W3: roughly -Wall, there is no -std=c++11 equivalent in MSVC.
   # /wd4722: ignores warning C4722 (destructor never returns) in loguru
   # /wd4267: ignores warning C4267 (conversion from 'size_t' to 'type'), roughly -Wno-sign-compare
   msvcflags = ['/nologo', '/FS', '/EHsc', '/Zi', '/W3', '/WX', '/wd4996', '/wd4722', '/wd4267', '/wd4800']
-  if ctx.options.variant != 'debug':
+  if ctx.options.variant == 'asan':
+    cxxflags.append('-fsanitize=address,undefined')
+    cxxflags.append('-O')
+    ldflags.append('-fsanitize=address,undefined')
+  elif ctx.options.variant == 'debug':
+    pass
+  else:
     cxxflags.append('-O3')
     msvcflags.append('/O2') # There is no O3
   if ctx.env.CXX_NAME != 'msvc':
     # If environment variable CXXFLAGS is unset, provide a sane default.
     if not ctx.env.CXXFLAGS:
       ctx.env.CXXFLAGS = cxxflags
+    if not ctx.env.LDFLAGS:
+      ctx.env.LDFLAGS = ldflags
   else:
     ctx.env.CXXFLAGS = msvcflags