diff --git a/configure.ac b/configure.ac
index b3f393bc8..3ed28e49d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1359,6 +1359,7 @@ AM_COND_IF([MINGW],
 [
 
 ], [
+	CXXFLAGS+=" -pthread"
 	LIBS+="-lpthread -latomic"
 ])