diff --git a/configure.ac b/configure.ac
index 63a012b35df49..9c55f33e84480 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1414,12 +1414,6 @@ if test "$use_boost" = "yes"; then
   fi
 fi
 
-case $host in
-  dnl Re-enable it after enabling Windows support in cpp-subprocess.
-  *mingw*)
-    use_external_signer="no"
-  ;;
-esac
 if test "$use_external_signer" = "yes"; then
   AC_DEFINE([ENABLE_EXTERNAL_SIGNER], [1], [Define if external signer support is enabled])
 fi