diff --git a/src/modules/partition/gui/EraseDiskPage.cpp b/src/modules/partition/gui/EraseDiskPage.cpp
index 1f53814b8..753818254 100644
--- a/src/modules/partition/gui/EraseDiskPage.cpp
+++ b/src/modules/partition/gui/EraseDiskPage.cpp
@@ -143,7 +143,7 @@ EraseDiskPage::doAutopartition( Device* dev )
     int empty_space_size = 0;
     if ( isEfi )
     {
-        uefisys_part_size = 100;
+        uefisys_part_size = 300;
         empty_space_size = 2;
     }
     else