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-rw-r--r--libcxxabi/src/fallback_malloc.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/libcxxabi/src/fallback_malloc.cpp b/libcxxabi/src/fallback_malloc.cpp
index daaf2192d9b..b83cb8f6226 100644
--- a/libcxxabi/src/fallback_malloc.cpp
+++ b/libcxxabi/src/fallback_malloc.cpp
@@ -22,6 +22,8 @@
// for each chunk. The overhead of each chunk is kept low by keeping pointers
// as two byte offsets within the heap, rather than (4 or 8 byte) pointers.
+#include <pthread.h>
+
namespace {
static pthread_mutex_t heap_mutex = PTHREAD_MUTEX_INITIALIZER;
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