diff --git a/lib/private/preview/office.php b/lib/private/preview/office.php
index 131bc9a0dc423f76b7c6ea770b458fc508a987d0..882c4426e6d245c692f1e3a7a9b8c7e54f400202 100644
--- a/lib/private/preview/office.php
+++ b/lib/private/preview/office.php
@@ -6,24 +6,29 @@
  * See the COPYING-README file.
  */
 //both, libreoffice backend and php fallback, need imagick
-if (extension_loaded('imagick') && count(@\Imagick::queryFormats("PDF")) === 1) {
-	$isShellExecEnabled = \OC_Helper::is_function_enabled('shell_exec');
+if (extension_loaded('imagick')) {
 
-	// LibreOffice preview is currently not supported on Windows
-	if (!\OC_Util::runningOnWindows()) {
-		$whichLibreOffice = ($isShellExecEnabled ? shell_exec('command -v libreoffice') : '');
-		$isLibreOfficeAvailable = !empty($whichLibreOffice);
-		$whichOpenOffice = ($isShellExecEnabled ? shell_exec('command -v libreoffice') : '');
-		$isOpenOfficeAvailable = !empty($whichOpenOffice);
-		//let's see if there is libreoffice or openoffice on this machine
-		if($isShellExecEnabled && ($isLibreOfficeAvailable || $isOpenOfficeAvailable || is_string(\OC_Config::getValue('preview_libreoffice_path', null)))) {
-			require_once('office-cl.php');
-		}else{
+	$checkImagick = new Imagick();
+
+	if(count($checkImagick->queryFormats('PDF')) === 1) {
+		$isShellExecEnabled = \OC_Helper::is_function_enabled('shell_exec');
+
+		// LibreOffice preview is currently not supported on Windows
+		if (!\OC_Util::runningOnWindows()) {
+			$whichLibreOffice = ($isShellExecEnabled ? shell_exec('command -v libreoffice') : '');
+			$isLibreOfficeAvailable = !empty($whichLibreOffice);
+			$whichOpenOffice = ($isShellExecEnabled ? shell_exec('command -v libreoffice') : '');
+			$isOpenOfficeAvailable = !empty($whichOpenOffice);
+			//let's see if there is libreoffice or openoffice on this machine
+			if($isShellExecEnabled && ($isLibreOfficeAvailable || $isOpenOfficeAvailable || is_string(\OC_Config::getValue('preview_libreoffice_path', null)))) {
+				require_once('office-cl.php');
+			}else{
+				//in case there isn't, use our fallback
+				require_once('office-fallback.php');
+			}
+		} else {
 			//in case there isn't, use our fallback
 			require_once('office-fallback.php');
 		}
-	} else {
-		//in case there isn't, use our fallback
-		require_once('office-fallback.php');
 	}
 }
diff --git a/lib/private/preview/pdf.php b/lib/private/preview/pdf.php
index d390b4fc6773402c15b444a794291e4d7d8b45cc..064a5a3b3d14b304184b46e1085ecb0aa114ff5d 100644
--- a/lib/private/preview/pdf.php
+++ b/lib/private/preview/pdf.php
@@ -7,34 +7,41 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick') && count(@\Imagick::queryFormats("PDF")) === 1) {
+use Imagick;
 
-	class PDF extends Provider {
+if (extension_loaded('imagick')) {
 
-		public function getMimeType() {
-			return '/application\/pdf/';
-		}
+	$checkImagick = new Imagick();
+
+	if(count($checkImagick->queryFormats('PDF')) === 1) {
 
-		public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {	
-			$tmpPath = $fileview->toTmpFile($path);
+		class PDF extends Provider {
 
-			//create imagick object from pdf
-			try{
-				$pdf = new \imagick($tmpPath . '[0]');
-				$pdf->setImageFormat('jpg');
-			} catch (\Exception $e) {
-				\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
-				return false;
+			public function getMimeType() {
+				return '/application\/pdf/';
 			}
 
-			unlink($tmpPath);
+			public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
+				$tmpPath = $fileview->toTmpFile($path);
+
+				//create imagick object from pdf
+				try{
+					$pdf = new Imagick($tmpPath . '[0]');
+					$pdf->setImageFormat('jpg');
+				} catch (\Exception $e) {
+					\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
+					return false;
+				}
+
+				unlink($tmpPath);
 
-			//new image object
-			$image = new \OC_Image($pdf);
-			//check if image object is valid
-			return $image->valid() ? $image : false;
+				//new image object
+				$image = new \OC_Image($pdf);
+				//check if image object is valid
+				return $image->valid() ? $image : false;
+			}
 		}
-	}
 
-	\OC\Preview::registerProvider('OC\Preview\PDF');
+		\OC\Preview::registerProvider('OC\Preview\PDF');
+	}
 }
diff --git a/lib/private/preview/svg.php b/lib/private/preview/svg.php
index 9a73fff94675dc6205c8baf99a18a3647ee10ef2..505122fddbfb2eb837df110e83f47756fc8cfd6f 100644
--- a/lib/private/preview/svg.php
+++ b/lib/private/preview/svg.php
@@ -7,40 +7,46 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick') && count(@\Imagick::queryFormats("SVG")) === 1) {
+use Imagick;
 
-	class SVG extends Provider {
+if (extension_loaded('imagick')) {
 
-		public function getMimeType() {
-			return '/image\/svg\+xml/';
-		}
+	$checkImagick = new Imagick();
 
-		public function getThumbnail($path,$maxX,$maxY,$scalingup,$fileview) {
-			try{
-				$svg = new \Imagick();
-				$svg->setBackgroundColor(new \ImagickPixel('transparent'));
+	if(count($checkImagick->queryFormats('SVG')) === 1) {
 
-				$content = stream_get_contents($fileview->fopen($path, 'r'));
-				if(substr($content, 0, 5) !== '<?xml') {
-					$content = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $content;
-				}
+		class SVG extends Provider {
 
-				$svg->readImageBlob($content);
-				$svg->setImageFormat('png32');
-			} catch (\Exception $e) {
-				\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
-				return false;
+			public function getMimeType() {
+				return '/image\/svg\+xml/';
 			}
 
+			public function getThumbnail($path,$maxX,$maxY,$scalingup,$fileview) {
+				try{
+					$svg = new Imagick();
+					$svg->setBackgroundColor(new \ImagickPixel('transparent'));
+
+					$content = stream_get_contents($fileview->fopen($path, 'r'));
+					if(substr($content, 0, 5) !== '<?xml') {
+						$content = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $content;
+					}
+
+					$svg->readImageBlob($content);
+					$svg->setImageFormat('png32');
+				} catch (\Exception $e) {
+					\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
+					return false;
+				}
 
-			//new image object
-			$image = new \OC_Image();
-			$image->loadFromData($svg);
-			//check if image object is valid
-			return $image->valid() ? $image : false;
-		}
-	}
 
-	\OC\Preview::registerProvider('OC\Preview\SVG');
+				//new image object
+				$image = new \OC_Image();
+				$image->loadFromData($svg);
+				//check if image object is valid
+				return $image->valid() ? $image : false;
+			}
+		}
 
+		\OC\Preview::registerProvider('OC\Preview\SVG');
+	}
 }
\ No newline at end of file