diff --git a/code/ryzom/client/src/login_patch.cpp b/code/ryzom/client/src/login_patch.cpp
index 4489f11bb..4c665da3d 100644
--- a/code/ryzom/client/src/login_patch.cpp
+++ b/code/ryzom/client/src/login_patch.cpp
@@ -933,7 +933,7 @@ void CPatchManager::createBatchFile(CProductDescriptionForClient &descFile, bool
 		if (wantRyzomRestart)
 		{
 			// wait until client not in memory anymore
-			contentSuffix += toString("until ! pgrep %s > /dev/null; do sleep 1; done\n", CFile::getFilename(RyzomFilename).c_str());
+			contentSuffix += toString("until ! pgrep \"%s\" > /dev/null; do sleep 1; done\n", CFile::getFilename(RyzomFilename).c_str());
 		}
 
 		// launch upgrade script if present (it'll execute additional steps like moving or deleting files)