diff --git a/meson.build b/meson.build
index 02c086c04e..cd410319f3 100644
--- a/meson.build
+++ b/meson.build
@@ -277,6 +277,8 @@ elif host_system == 'windows'
     # ldflags += '/nxcompat' # generated by msbuild, should have it for ninja?
   else
     ldflags += '-Wl,--stack,@0@'.format(cdata.get('WIN32_STACK_RLIMIT'))
+    # Need to allow multiple definitions, we e.g. want to override getopt.
+    ldflags += '-Wl,--allow-multiple-definition'
   endif
 
   os_deps += cc.find_library('ws2_32', required: true)