diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f54cb3595..35249a6d3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         cfg:
-        -  { os: windows-latest,  name: 'Windows 64-bit', pkg: 'Windows_64-bit',  opt: '--enable-werror' }
+        -  { os: windows-latest,  name: 'Windows 64-bit', pkg: 'Windows_64-bit',  opt: '--disable-iconc --enable-werror' }
         #-  { os: windows-latest,  name: 'Windows 32-bit', opt: '--build=i686-w64-mingw32 --host=i686-w64-mingw32' }
 
     defaults:
diff --git a/.github/workflows/packages.yml b/.github/workflows/packages.yml
index deca138bf..a33d93087 100644
--- a/.github/workflows/packages.yml
+++ b/.github/workflows/packages.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         cfg:
-        -  { os: windows-latest,  name: 'Windows_64-bit',  opt: '' }
+        -  { os: windows-latest,  name: 'Windows_64-bit',  opt: '--disable-iconc' }
         #-  { os: windows-latest,  name: 'Windows_32-bit', opt: '--build=i686-w64-mingw32 --host=i686-w64-mingw32' }
 
     defaults: