diff --git a/src/libunwind.cpp b/src/libunwind.cpp
--- a/src/libunwind.cpp
+++ b/src/libunwind.cpp
@@ -51,7 +51,7 @@
 # define REGISTER_KIND Registers_x86_64
 #elif defined(__powerpc64__)
 # define REGISTER_KIND Registers_ppc64
-#elif defined(__ppc__)
+#elif defined(__ppc__) || defined(__PPC__)
 # define REGISTER_KIND Registers_ppc
 #elif defined(__aarch64__)
 # define REGISTER_KIND Registers_arm64