--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,6 @@
 AC_SUBST([EXTRA_LDFLAGS])
 
 AS_CASE([$host],
-	[*mingw*], [CFLAGS="$CFLAGS -D_spawnv=spawnv"],
 	[CFLAGS="$CFLAGS"])
 
 AC_ARG_VAR([LIB_FUZZING_ENGINE], [Location of prebuilt fuzzing engine library])
