diff --git a/pkgs/base/info.rkt b/pkgs/base/info.rkt
index e543419070..4958cd69be 100644
--- a/pkgs/base/info.rkt
+++ b/pkgs/base/info.rkt
@@ -12,7 +12,7 @@
 
 (define collection 'multi)
 
-(define version "6.90.0.17")
+(define version "6.90.0.18")
 
 (define deps `("racket-lib"
                ["racket" #:version ,version]))
diff --git a/racket/src/expander/boot/core-primitive.rkt b/racket/src/expander/boot/core-primitive.rkt
index 26e6c92740..bb3c07a881 100644
--- a/racket/src/expander/boot/core-primitive.rkt
+++ b/racket/src/expander/boot/core-primitive.rkt
@@ -91,7 +91,7 @@
                       exn:fail:syntax:unbound?
                       
                       current-module-path-for-load
-                      prop:missing-module
+                      prop:exn:missing-module
                       exn:missing-module?
                       exn:missing-module-accessor
                       struct:exn:fail:filesystem:missing-module
diff --git a/racket/src/expander/expand/missing-module.rkt b/racket/src/expander/expand/missing-module.rkt
index 68dc7bc0a3..797deddfba 100644
--- a/racket/src/expander/expand/missing-module.rkt
+++ b/racket/src/expander/expand/missing-module.rkt
@@ -6,7 +6,7 @@
 (provide current-module-path-for-load
          maybe-raise-missing-module
          
-         prop:missing-module
+         prop:exn:missing-module
          exn:missing-module?
          exn:missing-module-accessor
          
@@ -15,12 +15,12 @@
          (struct-out exn:fail:syntax:missing-module)
          make-exn:fail:syntax:missing-module)
 
-(define-values (prop:missing-module exn:missing-module? exn:missing-module-accessor)
+(define-values (prop:exn:missing-module exn:missing-module? exn:missing-module-accessor)
   (make-struct-type-property 'missing-module
                              (lambda (v info)
                                (unless (and (procedure? v)
                                             (procedure-arity-includes? v 1))
-                                 (raise-argument-error 'guard-for-prop:missing-module
+                                 (raise-argument-error 'guard-for-prop:exn:missing-module
                                                        "(procedure-arity-includes/c 1)"
                                                        v))
                                v)))
@@ -28,11 +28,11 @@
 (struct exn:fail:filesystem:missing-module exn:fail:filesystem (path)
         #:extra-constructor-name make-exn:fail:filesystem:missing-module
         #:transparent
-        #:property prop:missing-module (lambda (e) (exn:fail:filesystem:missing-module-path e)))
+        #:property prop:exn:missing-module (lambda (e) (exn:fail:filesystem:missing-module-path e)))
 (struct exn:fail:syntax:missing-module exn:fail:syntax (path)
         #:extra-constructor-name make-exn:fail:syntax:missing-module
         #:transparent
-        #:property prop:missing-module (lambda (e) (exn:fail:syntax:missing-module-path e)))
+        #:property prop:exn:missing-module (lambda (e) (exn:fail:syntax:missing-module-path e)))
 
 (define current-module-path-for-load
   (make-parameter #f
diff --git a/racket/src/racket/src/schvers.h b/racket/src/racket/src/schvers.h
index 8d1fe0f97d..4c83bbd7ae 100644
--- a/racket/src/racket/src/schvers.h
+++ b/racket/src/racket/src/schvers.h
@@ -13,12 +13,12 @@
    consistently.)
 */
 
-#define MZSCHEME_VERSION "6.90.0.17"
+#define MZSCHEME_VERSION "6.90.0.18"
 
 #define MZSCHEME_VERSION_X 6
 #define MZSCHEME_VERSION_Y 90
 #define MZSCHEME_VERSION_Z 0
-#define MZSCHEME_VERSION_W 17
+#define MZSCHEME_VERSION_W 18
 
 #define MZSCHEME_VERSION_MAJOR ((MZSCHEME_VERSION_X * 100) + MZSCHEME_VERSION_Y)
 #define MZSCHEME_VERSION_MINOR ((MZSCHEME_VERSION_Z * 1000) + MZSCHEME_VERSION_W)
diff --git a/racket/src/racket/src/startup.inc b/racket/src/racket/src/startup.inc
index 70f43890ee..926c6c1bbf 100644
--- a/racket/src/racket/src/startup.inc
+++ b/racket/src/racket/src/startup.inc
@@ -56794,14 +56794,15 @@ static const char *startup_source =
 "((temp3_9)(substitute-module-declare-name name_71)))"
 "(declare-module!58.1 #f #f in-ns1_0 temp2_6 temp3_9))))))"
 "(define-values"
-"(1/prop:missing-module 1/exn:missing-module? 1/exn:missing-module-accessor)"
+"(prop:exn:missing-module 1/exn:missing-module? 1/exn:missing-module-accessor)"
 "(make-struct-type-property"
 " 'missing-module"
 "(lambda(v_27 info_6)"
 "(begin"
 "(if(if(procedure? v_27)(procedure-arity-includes? v_27 1) #f)"
 "(void)"
-"         (let-values () (raise-argument-error 'guard-for-prop:missing-module \"(procedure-arity-includes/c 1)\" v_27)))"
+"(let-values()"
+"           (raise-argument-error 'guard-for-prop:exn:missing-module \"(procedure-arity-includes/c 1)\" v_27)))"
 " v_27))))"
 "(define-values"
 "(1/struct:exn:fail:filesystem:missing-module"
@@ -56818,7 +56819,7 @@ static const char *startup_source =
 " 0"
 " #f"
 "(list"
-"(cons 1/prop:missing-module(lambda(e_85)(1/exn:fail:filesystem:missing-module-path e_85))))"
+"(cons prop:exn:missing-module(lambda(e_85)(1/exn:fail:filesystem:missing-module-path e_85))))"
 " #f"
 " #f"
 " '(0)"
@@ -56839,7 +56840,7 @@ static const char *startup_source =
 " 1"
 " 0"
 " #f"
-"(list(cons 1/prop:missing-module(lambda(e_72)(1/exn:fail:syntax:missing-module-path e_72))))"
+"(list(cons prop:exn:missing-module(lambda(e_72)(1/exn:fail:syntax:missing-module-path e_72))))"
 " #f"
 " #f"
 " '(0)"
@@ -57737,7 +57738,7 @@ static const char *startup_source =
 " 'make-exn:fail:syntax:unbound"
 " 'exn:fail:syntax:unbound?"
 " 'current-module-path-for-load"
-" 'prop:missing-module"
+" 'prop:exn:missing-module"
 " 'exn:missing-module?"
 " 'exn:missing-module-accessor"
 " 'struct:exn:fail:filesystem:missing-module"
@@ -57872,7 +57873,7 @@ static const char *startup_source =
 "(add-core-primitive! 'make-exn:fail:syntax:unbound make-exn:fail:syntax:unbound$1)"
 "(add-core-primitive! 'exn:fail:syntax:unbound? 1/exn:fail:syntax:unbound?)"
 "(add-core-primitive! 'current-module-path-for-load 1/current-module-path-for-load)"
-"(add-core-primitive! 'prop:missing-module 1/prop:missing-module)"
+"(add-core-primitive! 'prop:exn:missing-module prop:exn:missing-module)"
 "(add-core-primitive! 'exn:missing-module? 1/exn:missing-module?)"
 "(add-core-primitive! 'exn:missing-module-accessor 1/exn:missing-module-accessor)"
 "(add-core-primitive! 'struct:exn:fail:filesystem:missing-module 1/struct:exn:fail:filesystem:missing-module)"