diff --git a/src/bpf_tracing.h b/src/bpf_tracing.h
index a5e9265..20bc637 100644
--- a/src/bpf_tracing.h
+++ b/src/bpf_tracing.h
@@ -180,6 +180,8 @@
 #define __PT_RC_REG gpr[3]
 #define __PT_SP_REG sp
 #define __PT_IP_REG nip
+/* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER. */
+#define PT_REGS_SYSCALL_REGS(ctx) ctx
 
 #elif defined(bpf_target_sparc)