diff --git a/artiq/coredevice/core.py b/artiq/coredevice/core.py
index bd8483098..67b704ac5 100644
--- a/artiq/coredevice/core.py
+++ b/artiq/coredevice/core.py
@@ -45,10 +45,6 @@ def cache_get(key: TStr) -> TList(TInt32):
 def cache_put(key: TStr, value: TList(TInt32)):
     raise NotImplementedError("syscall not simulated")
 
-@syscall
-def cache_clear(key: TStr):
-    raise NotImplementedError("syscall not simulated")
-
 class Core:
     """Core device driver.
 
@@ -128,7 +124,3 @@ class Core:
     @kernel
     def put_cache(self, key, value):
         return cache_put(key, value)
-
-    @kernel
-    def clear_cache(self, key):
-        return cache_clear(key)
diff --git a/artiq/runtime/ksupport.c b/artiq/runtime/ksupport.c
index af2610413..b35033ee8 100644
--- a/artiq/runtime/ksupport.c
+++ b/artiq/runtime/ksupport.c
@@ -124,7 +124,6 @@ static const struct symbol runtime_exports[] = {
 
     {"cache_get", &cache_get},
     {"cache_put", &cache_put},
-    {"cache_clear", &cache_clear},
 
     /* end */
     {NULL, NULL}
@@ -492,11 +491,6 @@ void cache_put(const char *key, struct artiq_list value)
     }
 }
 
-void cache_clear(const char *key)
-{
-    cache_put(key, (struct artiq_list) { 0, NULL });
-}
-
 void lognonl(const char *fmt, ...)
 {
     struct msg_log request;
diff --git a/artiq/runtime/ksupport.h b/artiq/runtime/ksupport.h
index 144392a15..2194ef0db 100644
--- a/artiq/runtime/ksupport.h
+++ b/artiq/runtime/ksupport.h
@@ -14,7 +14,6 @@ void send_rpc(int service, const char *tag, ...);
 int recv_rpc(void *slot);
 struct artiq_list cache_get(const char *key);
 void cache_put(const char *key, struct artiq_list value);
-void cache_clear(const char *key);
 void lognonl(const char *fmt, ...);
 void log(const char *fmt, ...);