diff --git a/src/notify.hxx b/src/notify.hxx
index cde29468f..ebd12e5c6 100644
--- a/src/notify.hxx
+++ b/src/notify.hxx
@@ -28,7 +28,7 @@ struct notify {
 	Cond cond;
 	bool pending;
 
-#ifndef WIN32
+#if !defined(WIN32) && !defined(__BIONIC__)
 	constexpr
 #endif
 	notify():pending(false) {}
diff --git a/src/thread/PosixCond.hxx b/src/thread/PosixCond.hxx
index 6f98d3ad0..35aa8c88a 100644
--- a/src/thread/PosixCond.hxx
+++ b/src/thread/PosixCond.hxx
@@ -41,7 +41,10 @@ class PosixCond {
 	pthread_cond_t cond;
 
 public:
-	constexpr PosixCond():cond(PTHREAD_COND_INITIALIZER) {}
+#ifndef __BIONIC__
+	constexpr
+#endif
+	PosixCond():cond(PTHREAD_COND_INITIALIZER) {}
 
 	PosixCond(const PosixCond &other) = delete;
 	PosixCond &operator=(const PosixCond &other) = delete;
diff --git a/src/thread/PosixMutex.hxx b/src/thread/PosixMutex.hxx
index d50764af4..464ed5787 100644
--- a/src/thread/PosixMutex.hxx
+++ b/src/thread/PosixMutex.hxx
@@ -41,7 +41,10 @@ class PosixMutex {
 	pthread_mutex_t mutex;
 
 public:
-	constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {}
+#ifndef __BIONIC__
+	constexpr
+#endif
+	PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {}
 
 	PosixMutex(const PosixMutex &other) = delete;
 	PosixMutex &operator=(const PosixMutex &other) = delete;