diff --git a/src/SPC/builder/extension/decimal.php b/src/SPC/builder/extension/decimal.php
index 72a694ff..795bce2d 100644
--- a/src/SPC/builder/extension/decimal.php
+++ b/src/SPC/builder/extension/decimal.php
@@ -19,6 +19,12 @@ class decimal extends Extension
             'zend_module_entry decimal_module_entry',
             'zend_module_entry php_decimal_module_entry'
         );
+        FileSystem::replaceFileStr(
+            $this->source_dir . '/config.w32',
+            'ARG_WITH("decimal", "for decimal support", "no");',
+            'ARG_WITH("decimal", "for decimal support",  "no");' . "\n" .
+            'ADD_EXTENSION_DEP("decimal", "json");'
+        );
         return true;
     }
 
diff --git a/src/SPC/builder/windows/library/libmpdec.php b/src/SPC/builder/windows/library/libmpdec.php
index eda5f5c8..1493b69a 100644
--- a/src/SPC/builder/windows/library/libmpdec.php
+++ b/src/SPC/builder/windows/library/libmpdec.php
@@ -29,13 +29,5 @@ class libmpdec extends WindowsLibraryBase
             }
         }
         copy($makefile_dir . '\mpdecimal.h', BUILD_INCLUDE_PATH . '\mpdecimal.h');
-
-        // Disable dllimport for static linking: the header defaults to
-        // __declspec(dllimport) when _DLL is defined, idk if php builds with /MD
-        FileSystem::replaceFileStr(
-            BUILD_INCLUDE_PATH . '\mpdecimal.h',
-            '#elif defined(_DLL)',
-            '#elif 0'
-        );
     }
 }