diff --git a/libc/bionic/pthread_create.cpp b/libc/bionic/pthread_create.cpp
index 7bf9b40..844f9d8 100644
--- a/libc/bionic/pthread_create.cpp
+++ b/libc/bionic/pthread_create.cpp
@@ -140,7 +140,7 @@
 #if defined(__aarch64__)
   __asm__ __volatile__("mov x18, %0" ::"r"(scs));
 #elif defined(__riscv)
-  __asm__ __volatile__("mv gp, %0" ::"r"(scs));
+  __asm__ __volatile__("mv x3, %0" ::"r"(scs));
 #endif
 #endif
 }