diff --git a/xpcom/base/nsMemoryReporterManager.cpp b/xpcom/base/nsMemoryReporterManager.cpp
index 865e1b5430..9a00dafecb 100644
--- a/xpcom/base/nsMemoryReporterManager.cpp
+++ b/xpcom/base/nsMemoryReporterManager.cpp
@@ -124,6 +124,7 @@ static MOZ_MUST_USE nsresult ResidentUniqueDistinguishedAmount(int64_t* aN) {
   return GetProcSelfSmapsPrivate(aN);
 }

+#ifdef __GLIBC__
 #  ifdef HAVE_MALLINFO
 #    define HAVE_SYSTEM_HEAP_REPORTER 1
 static MOZ_MUST_USE nsresult SystemHeapSize(int64_t* aSizeOut) {
@@ -143,6 +144,7 @@ static MOZ_MUST_USE nsresult SystemHeapSize(int64_t* aSizeOut) {
   return NS_OK;
 }
 #  endif
+#endif

 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || \
     defined(__OpenBSD__) || defined(__FreeBSD_kernel__)
