diff --git a/src/core/stdc/stdlib.d b/src/core/stdc/stdlib.d
index 6fe432aace..9348c7d107 100644
--- a/src/core/stdc/stdlib.d
+++ b/src/core/stdc/stdlib.d
@@ -157,11 +157,11 @@ else
 // functions using these already have to be @trusted, allowing them to
 // call @system stuff anyway.
 ///
-void*   malloc(size_t size) pure;
+void*   malloc(size_t size);
 ///
-void*   calloc(size_t nmemb, size_t size) pure;
+void*   calloc(size_t nmemb, size_t size);
 ///
-void*   realloc(void* ptr, size_t size) pure;
+void*   realloc(void* ptr, size_t size);
 ///
 void    free(void* ptr);
 
diff --git a/src/core/sys/posix/stdlib.d b/src/core/sys/posix/stdlib.d
index c9450a8412..4afd346d46 100644
--- a/src/core/sys/posix/stdlib.d
+++ b/src/core/sys/posix/stdlib.d
@@ -122,42 +122,42 @@ version( CRuntime_Glibc )
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure; // LEGACY non-standard
+    void* valloc(size_t); // LEGACY non-standard
 }
 else version( Darwin )
 {
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure; // LEGACY non-standard
+    void* valloc(size_t); // LEGACY non-standard
 }
 else version( FreeBSD )
 {
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure; // LEGACY non-standard
+    void* valloc(size_t); // LEGACY non-standard
 }
 else version( OpenBSD )
 {
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure; // LEGACY non-standard
+    void* valloc(size_t); // LEGACY non-standard
 }
 else version( CRuntime_Bionic )
 {
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure;
+    void* valloc(size_t);
 }
 else version( Solaris )
 {
     int setenv(in char*, in char*, int);
     int unsetenv(in char*);
 
-    void* valloc(size_t) pure; // LEGACY non-standard
+    void* valloc(size_t); // LEGACY non-standard
 }
 
 //