diff --git a/src/libply/ply-logger.c b/src/libply/ply-logger.c
index 789ad4ef..429e1ff1 100644
--- a/src/libply/ply-logger.c
+++ b/src/libply/ply-logger.c
@@ -40,7 +40,7 @@
 #include "ply-list.h"
 
 #ifndef PLY_LOGGER_OPEN_FLAGS
-#define PLY_LOGGER_OPEN_FLAGS (O_WRONLY | O_TRUNC | O_CREAT | O_NOFOLLOW | O_CLOEXEC)
+#define PLY_LOGGER_OPEN_FLAGS (O_WRONLY | O_APPEND | O_CREAT | O_NOFOLLOW | O_CLOEXEC)
 #endif
 
 #ifndef PLY_LOGGER_MAX_INJECTION_SIZE