diff --git a/src/SPC/builder/windows/library/icu_static_win.php b/src/SPC/builder/windows/library/icu_static_win.php
index 04c8e589..c152c6e7 100644
--- a/src/SPC/builder/windows/library/icu_static_win.php
+++ b/src/SPC/builder/windows/library/icu_static_win.php
@@ -12,16 +12,16 @@ class icu_static_win extends WindowsLibraryBase
 
     protected function build(): void
     {
-        copy("{$this->source_dir}\\x64-windows-static\lib\icudt.lib", "{$this->getLibDir()}\icudt.lib");
-        copy("{$this->source_dir}\\x64-windows-static\lib\icuin.lib", "{$this->getLibDir()}\icuin.lib");
-        copy("{$this->source_dir}\\x64-windows-static\lib\icuio.lib", "{$this->getLibDir()}\icuio.lib");
-        copy("{$this->source_dir}\\x64-windows-static\lib\icuuc.lib", "{$this->getLibDir()}\icuuc.lib");
+        copy("{$this->source_dir}\\x64-windows-static\\lib\\icudt.lib", "{$this->getLibDir()}\\icudt.lib");
+        copy("{$this->source_dir}\\x64-windows-static\\lib\\icuin.lib", "{$this->getLibDir()}\\icuin.lib");
+        copy("{$this->source_dir}\\x64-windows-static\\lib\\icuio.lib", "{$this->getLibDir()}\\icuio.lib");
+        copy("{$this->source_dir}\\x64-windows-static\\lib\\icuuc.lib", "{$this->getLibDir()}\\icuuc.lib");
 
         // create libpq folder in buildroot/includes/libpq
-        if (!file_exists("{$this->getIncludeDir()}\unicode")) {
-            mkdir("{$this->getIncludeDir()}\unicode");
+        if (!file_exists("{$this->getIncludeDir()}\\unicode")) {
+            mkdir("{$this->getIncludeDir()}\\unicode");
         }
 
-        FileSystem::copyDir("{$this->source_dir}\\x64-windows-static\include\unicode", "{$this->getIncludeDir()}\unicode");
+        FileSystem::copyDir("{$this->source_dir}\\x64-windows-static\\include\\unicode", "{$this->getIncludeDir()}\\unicode");
     }
 }