diff --git a/Classes/Hooks/RenderPreProcessorHook.php b/Classes/Hooks/RenderPreProcessorHook.php
index c57ae39..33beea3 100644
--- a/Classes/Hooks/RenderPreProcessorHook.php
+++ b/Classes/Hooks/RenderPreProcessorHook.php
@@ -134,7 +134,11 @@ public function renderPreProcessorProc(array &$params, PageRenderer $pageRendere
 
             $scssFilePath = GeneralUtility::getFileAbsFileName($conf['file']);
             $pathChunks = explode('/', PathUtility::getAbsoluteWebPath($scssFilePath));
-            $assetPath = implode('/', array_splice($pathChunks, 0, 3)) . '/';
+            if (self::usesComposerClassLoading()) {
+                $assetPath = implode('/',array_splice($pathChunks,0,3)).'/';
+            } else {
+                $assetPath = implode('/',array_splice($pathChunks,0,6)).'/';
+            }
 
             if ($inlineOutput) {
                 $useSourceMap = false;
@@ -171,4 +175,9 @@ private function parseBooleanSetting(string $value, bool $defaultValue): bool
         }
         return $defaultValue;
     }
+
+    protected static function usesComposerClassLoading(): bool
+    {
+        return defined('TYPO3_COMPOSER_MODE') && TYPO3_COMPOSER_MODE;
+    }
 }
diff --git a/Classes/ViewHelpers/Asset/ScssViewHelper.php b/Classes/ViewHelpers/Asset/ScssViewHelper.php
index 7c84ba9..e31f71f 100644
--- a/Classes/ViewHelpers/Asset/ScssViewHelper.php
+++ b/Classes/ViewHelpers/Asset/ScssViewHelper.php
@@ -126,7 +126,11 @@ public function render(): string
                 throw new ContentRenderingException('Could not resolve the path to the SCSS file. Probably the path is not correct! Path: '.$file);
             }
             $pathChunks = explode('/',PathUtility::getAbsoluteWebPath($scssFilePath));
-            $assetPath = implode('/',array_splice($pathChunks,0,3)).'/';
+            if (self::usesComposerClassLoading()) {
+                $assetPath = implode('/',array_splice($pathChunks,0,3)).'/';
+            } else {
+                $assetPath = implode('/',array_splice($pathChunks,0,6)).'/';
+            }
             $variables['extAssetPath'] = $assetPath;
 
             $cssFile = Compiler::compileFile($file, $variables, $outputFile);
@@ -166,4 +170,9 @@ private function cleanVariables($variables): array
         return $variables;
     }
 
+    protected static function usesComposerClassLoading(): bool
+    {
+        return defined('TYPO3_COMPOSER_MODE') && TYPO3_COMPOSER_MODE;
+    }
+
 }