diff --git a/mozilla/security/nss/lib/freebl/mpi/mpcpucache.c b/mozilla/security/nss/lib/freebl/mpi/mpcpucache.c
index 2ad291fab..a1fdedcbd 100644
--- a/mozilla/security/nss/lib/freebl/mpi/mpcpucache.c
+++ b/mozilla/security/nss/lib/freebl/mpi/mpcpucache.c
@@ -704,7 +704,11 @@ s_mpi_getProcessorLineSize()
 #define MPI_GET_PROCESSOR_LINE_SIZE_DEFINED 1
 #endif
 
-#if defined(__ppc64__)
+/*
+ * Build of this code is broken on ppc64le.
+ * Btw, clang defines __ppc64__ preprocessor macro, but gcc doesn't.
+ */
+#if defined(__ppc64__) && defined(__BIG_ENDIAN__)
 /*
  *  Sigh, The PPC has some really nice features to help us determine cache
  *  size, since it had lots of direct control functions to do so. The POWER