--- a/third_party/dawn/src/dawn/common/Platform.h
+++ b/third_party/dawn/src/dawn/common/Platform.h
@@ -159,10 +159,12 @@
 #elif defined(__s390x__)
 #define DAWN_PLATFORM_IS_S390X 1
 
-#elif defined(__PPC__)
-#define DAWN_PLATFORM_IS_PPC 1
+// Order matters here
+// PPC64 also defines PPC, which can lead to detection failures on ppc64le systems
 #elif defined(__PPC64__)
 #define DAWN_PLATFORM_IS_PPC64 1
+#elif defined(__PPC__)
+#define DAWN_PLATFORM_IS_PPC 1
 
 #elif defined(__wasm32__)
 #define DAWN_PLATFORM_IS_WASM32 1