diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index 5270851..e4df298 100644
--- a/include/hw/riscv/sifive_u.h
+++ b/include/hw/riscv/sifive_u.h
@@ -77,8 +77,7 @@
 enum {
     SIFIVE_U_CLOCK_FREQ = 1000000000,
     SIFIVE_U_HFCLK_FREQ = 33333333,
-    SIFIVE_U_RTCCLK_FREQ = 1000000,
-    SIFIVE_U_GEM_CLOCK_FREQ = 125000000
+    SIFIVE_U_RTCCLK_FREQ = 1000000
 };
 
 #define SIFIVE_U_MANAGEMENT_CPU_COUNT   1