diff --git a/csrc/htif_emulator.h b/csrc/htif_emulator.h
index b9dfe7d6..134bca27 100644
--- a/csrc/htif_emulator.h
+++ b/csrc/htif_emulator.h
@@ -24,7 +24,11 @@ class htif_emulator_t : public htif_pthread_t
 
   void set_clock_divisor(int divisor, int hold_cycles)
   {
+#ifdef UNCORE_SCR__HTIF_IO_CLOCK_DIVISOR
+    /* We only want to write the HTIF clock divisor SCR on targets where it
+     * actually exists (there isn't one on the FPGA, for example). */
     write_cr(-1, UNCORE_SCR__HTIF_IO_CLOCK_DIVISOR, divisor | hold_cycles << 16);
+#endif
   }
 
   void start()