diff --git a/servo/components/style/build.rs b/servo/components/style/build.rs
index 2e2cc75558baa..5318d414ebba5 100644
--- a/servo/components/style/build.rs
+++ b/servo/components/style/build.rs
@@ -644,6 +644,52 @@ crate
 "
 )
 .
+envs
+(
+if
+std
+:
+:
+mem
+:
+:
+size_of
+:
+:
+<
+Option
+<
+bool
+>
+>
+(
+)
+=
+=
+1
+{
+vec
+!
+[
+(
+"
+RUSTC_HAS_PR45225
+"
+"
+1
+"
+)
+]
+}
+else
+{
+vec
+!
+[
+]
+}
+)
+.
 status
 (
 )
diff --git a/servo/components/style/properties/build.py b/servo/components/style/properties/build.py
index 9358c9bb9d343..061e9e07b6f3b 100644
--- a/servo/components/style/properties/build.py
+++ b/servo/components/style/properties/build.py
@@ -258,6 +258,19 @@
 __file__
 =
 template
+                  
+RUSTC_HAS_PR45225
+=
+os
+.
+environ
+.
+get
+(
+"
+RUSTC_HAS_PR45225
+"
+)
 )
     
 if
diff --git a/servo/components/style/properties/data.py b/servo/components/style/properties/data.py
index 814c93f7b2da1..da775ea6b2a7b 100644
--- a/servo/components/style/properties/data.py
+++ b/servo/components/style/properties/data.py
@@ -1107,6 +1107,19 @@
 False
 "
 ]
+"
+Unexpected
+value
+for
+boolean
+arguement
+:
+"
++
+repr
+(
+arg
+)
     
 return
 arg
diff --git a/servo/components/style/properties/longhand/inherited_svg.mako.rs b/servo/components/style/properties/longhand/inherited_svg.mako.rs
index f98012adfc632..d05f07612328d 100644
--- a/servo/components/style/properties/longhand/inherited_svg.mako.rs
+++ b/servo/components/style/properties/longhand/inherited_svg.mako.rs
@@ -564,9 +564,8 @@ gecko
 "
 boxed
 =
-"
-True
-"
+not
+RUSTC_HAS_PR45225
 animation_value_type
 =
 "
@@ -922,9 +921,8 @@ gecko
 "
 boxed
 =
-"
-True
-"
+not
+RUSTC_HAS_PR45225
 animation_value_type
 =
 "
diff --git a/servo/components/style/properties/longhand/pointing.mako.rs b/servo/components/style/properties/longhand/pointing.mako.rs
index 8d3a67a4d861c..0c5a784bc4f79 100644
--- a/servo/components/style/properties/longhand/pointing.mako.rs
+++ b/servo/components/style/properties/longhand/pointing.mako.rs
@@ -1516,7 +1516,8 @@ Auto
 "
 boxed
 =
-True
+not
+RUSTC_HAS_PR45225
 ignored_when_colors_disabled
 =
 True
diff --git a/servo/tests/unit/stylo/build.rs b/servo/tests/unit/stylo/build.rs
index 3f550c623f976..c2fd1a6349865 100644
--- a/servo/tests/unit/stylo/build.rs
+++ b/servo/tests/unit/stylo/build.rs
@@ -50,6 +50,42 @@ main
 (
 )
 {
+if
+std
+:
+:
+mem
+:
+:
+size_of
+:
+:
+<
+Option
+<
+bool
+>
+>
+(
+)
+=
+=
+1
+{
+println
+!
+(
+"
+cargo
+:
+rustc
+-
+cfg
+=
+rustc_has_pr45225
+"
+)
+}
 let
 root_path
 =
diff --git a/servo/tests/unit/stylo/size_of.rs b/servo/tests/unit/stylo/size_of.rs
index 9c0b8475a8dce..3767dd41e62f4 100644
--- a/servo/tests/unit/stylo/size_of.rs
+++ b/servo/tests/unit/stylo/size_of.rs
@@ -416,7 +416,19 @@ image
 :
 :
 ImageLayer
+if
+cfg
+!
+(
+rustc_has_pr45225
+)
+{
+40
+}
+else
+{
 48
+}
 )
 ;
 size_of_test
@@ -430,6 +442,18 @@ image
 :
 :
 ImageLayer
+if
+cfg
+!
+(
+rustc_has_pr45225
+)
+{
+40
+}
+else
+{
 48
+}
 )
 ;