diff --git a/meson.build b/meson.build
index 67cbd07..10e6f4e 100644
--- a/meson.build
+++ b/meson.build
@@ -167,11 +167,12 @@ if neon_opt != 'no' and not have_neon
       arch_cflags += ['-mfpu=neon', '-DWEBRTC_HAS_NEON']
       have_neon = true
     endif
-  else
-    arch_cflags += ['-DWEBRTC_DETECT_NEON', '-mfpu=neon']
-    have_neon = true
   endif
 endif
+if neon_opt == 'runtime'
+  warning('webrtc cannot check NEON support at runtime, will build without NEON')
+  have_neon = false
+endif
 
 common_cflags = [
   '-DWEBRTC_LIBRARY_IMPL',