diff --git a/src/mongo/platform/bits.h b/src/mongo/platform/bits.h
index 860bfbdccedad..f3f443209024b 100644
--- a/src/mongo/platform/bits.h
+++ b/src/mongo/platform/bits.h
@@ -19,7 +19,7 @@
 
 // figure out if we're on a 64 or 32 bit system
 
-#if defined(__x86_64__) || defined(__amd64__) || defined(_WIN64) || defined(__aarch64__)
+#if defined(__x86_64__) || defined(__amd64__) || defined(_WIN64) || defined(__aarch64__) || defined(__powerpc64__)
 #define MONGO_PLATFORM_64
 #elif defined(__i386__) || defined(_WIN32) || defined(__arm__)
 #define MONGO_PLATFORM_32