diff --git a/repos/libports/src/lib/libc/libc_init.h b/repos/libports/src/lib/libc/libc_init.h
index df2a2f5d6..3265fbbe2 100644
--- a/repos/libports/src/lib/libc/libc_init.h
+++ b/repos/libports/src/lib/libc/libc_init.h
@@ -28,6 +28,11 @@ namespace Libc {
 	 * Global memory allocator
 	 */
 	void init_mem_alloc(Genode::Env &env);
+
+	/**
+	 * Support for querying available RAM quota in sysctl functions
+	 */
+	void sysctl_init(Genode::Env &env);
 }
 
 #endif /* _LIBC_INIT_H_ */
diff --git a/repos/libports/src/lib/libc/sysctl.cc b/repos/libports/src/lib/libc/sysctl.cc
index f02c03720..9f1d7f69b 100644
--- a/repos/libports/src/lib/libc/sysctl.cc
+++ b/repos/libports/src/lib/libc/sysctl.cc
@@ -27,11 +27,21 @@
 #include <unistd.h>
 
 #include "libc_errno.h"
+#include "libc_init.h"
 
 
 enum { PAGESIZE = 4096 };
 
 
+static Genode::Env *_global_env;
+
+
+void Libc::sysctl_init(Genode::Env &env)
+{
+	_global_env = &env;
+}
+
+
 extern "C" long sysconf(int name)
 {
 	switch (name) {
@@ -42,7 +52,7 @@ extern "C" long sysconf(int name)
 	case _SC_PAGESIZE:         return PAGESIZE;
 
 	case _SC_PHYS_PAGES:
-		return Genode::env()->ram_session()->quota() / PAGESIZE;
+		return _global_env->ram().quota() / PAGESIZE;
 	default:
 		Genode::warning(__func__, "(", name, ") not implemented");
 		return Libc::Errno(EINVAL);
@@ -117,7 +127,7 @@ extern "C" int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
 
 			case HW_PHYSMEM:
 			case HW_USERMEM:
-				*(unsigned long*)oldp = Genode::env()->ram_session()->quota();
+				*(unsigned long*)oldp = _global_env->ram().quota();
 				*oldlenp = sizeof(unsigned long);
 				return 0;
 
diff --git a/repos/libports/src/lib/libc/task.cc b/repos/libports/src/lib/libc/task.cc
index cbc94233a..33be2a7ac 100644
--- a/repos/libports/src/lib/libc/task.cc
+++ b/repos/libports/src/lib/libc/task.cc
@@ -836,6 +836,7 @@ void Component::construct(Genode::Env &env)
 	/* pass Genode::Env to libc subsystems that depend on it */
 	Libc::init_mem_alloc(env);
 	Libc::init_dl(env);
+	Libc::sysctl_init(env);
 
 	/* initialize plugins that require Genode::Env */
 	auto init_plugin = [&] (Libc::Plugin &plugin) {