diff --git a/build/jam/BuildSetup b/build/jam/BuildSetup
index d9b15a417f..3315af5375 100644
--- a/build/jam/BuildSetup
+++ b/build/jam/BuildSetup
@@ -48,7 +48,7 @@ HAIKU_DEFAULT_IMAGE_NAME = haiku.image ;
 HAIKU_DEFAULT_IMAGE_DIR = $(HAIKU_OUTPUT_DIR) ;
 HAIKU_DEFAULT_VMWARE_IMAGE_NAME = haiku.vmdk ;
 HAIKU_DEFAULT_INSTALL_DIR = /Haiku ;
-HAIKU_DEFAULT_IMAGE_SIZE ?= 100 ; # 100 MB
+HAIKU_DEFAULT_IMAGE_SIZE ?= 128 ; # 128 MB
 
 
 # analyze an optionally replace jam's target parameters