diff --git a/Recipe b/Recipe
index 14e26b3d..2b0669c2 100644
--- a/Recipe
+++ b/Recipe
@@ -312,15 +312,15 @@ LIBS     = advapi32.lib user32.lib gdi32.lib comdlg32.lib
 # Network backend sets. This also brings in the relevant attachment
 # to proxy.c depending on whether we're crypto-avoidant or not.
 BE_ALL   = be_all cproxy
-BE_NOSSH = be_nossh nocproxy
+BE_NOSSH = be_nossh norand nocproxy
 BE_SSH   = be_ssh cproxy
 BE_NONE  = be_none nocproxy
 # More backend sets, with the additional Windows serial-port module.
 W_BE_ALL = be_all_s winser cproxy
-W_BE_NOSSH = be_nos_s winser nocproxy
+W_BE_NOSSH = be_nos_s norand winser nocproxy
 # And with the Unix serial-port module.
 U_BE_ALL = be_all_s uxser cproxy
-U_BE_NOSSH = be_nos_s uxser nocproxy
+U_BE_NOSSH = be_nos_s norand uxser nocproxy
 
 # Auxiliary crypto modules used by key generators.
 KEYGEN   = sshrsag sshdssg sshecdsag
diff --git a/be_nos_s.c b/be_nos_s.c
index 15906cfa..f298f1b5 100644
--- a/be_nos_s.c
+++ b/be_nos_s.c
@@ -17,18 +17,3 @@ const struct BackendVtable *const backends[] = {
     &serial_backend,
     NULL
 };
-
-/*
- * Stub implementations of functions not used in non-ssh versions.
- */
-void random_save_seed(void)
-{
-}
-
-void random_destroy_seed(void)
-{
-}
-
-void noise_ultralight(NoiseSourceId id, unsigned long data)
-{
-}
diff --git a/be_nossh.c b/be_nossh.c
index 184f28dc..9adc8837 100644
--- a/be_nossh.c
+++ b/be_nossh.c
@@ -16,18 +16,3 @@ const struct BackendVtable *const backends[] = {
     &raw_backend,
     NULL
 };
-
-/*
- * Stub implementations of functions not used in non-ssh versions.
- */
-void random_save_seed(void)
-{
-}
-
-void random_destroy_seed(void)
-{
-}
-
-void noise_ultralight(NoiseSourceId id, unsigned long data)
-{
-}
diff --git a/norand.c b/norand.c
new file mode 100644
index 00000000..2ad9f661
--- /dev/null
+++ b/norand.c
@@ -0,0 +1,22 @@
+/*
+ * Stub implementations of RNG functions for applications without an RNG. 
+ */
+
+#include "putty.h"
+
+void random_read(void *out, size_t size)
+{
+    unreachable("Random numbers are not available in this application");
+}
+
+void random_save_seed(void)
+{
+}
+
+void random_destroy_seed(void)
+{
+}
+
+void noise_ultralight(NoiseSourceId id, unsigned long data)
+{
+}