diff --git a/meta/recipes-core/images/core-image-ptest.bb b/meta/recipes-core/images/core-image-ptest.bb
index b6f5c2fd60..f2d0ae94b8 100644
--- a/meta/recipes-core/images/core-image-ptest.bb
+++ b/meta/recipes-core/images/core-image-ptest.bb
@@ -21,7 +21,7 @@ BBCLASSEXTEND = "${@' '.join(['mcextend:'+x for x in d.getVar('PTESTS').split()]
 IMAGE_OVERHEAD_FACTOR = "1.0"
 IMAGE_ROOTFS_EXTRA_SPACE = "324288"
 IMAGE_ROOTFS_EXTRA_SPACE:virtclass-mcextend-mdadm = "1524288"
-IMAGE_ROOTFS_EXTRA_SPACE:virtclass-mcextend-strace = "1024288"
+IMAGE_ROOTFS_EXTRA_SPACE:virtclass-mcextend-strace = "1524288"
 IMAGE_ROOTFS_EXTRA_SPACE:virtclass-mcextend-lttng-tools = "1524288"
 
 # tar-ptest in particular needs more space