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-rw-r--r--src/libudev/libudev-private.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libudev/libudev-private.h b/src/libudev/libudev-private.h
index 91f92264d..986c40c91 100644
--- a/src/libudev/libudev-private.h
+++ b/src/libudev/libudev-private.h
@@ -19,9 +19,13 @@
#include "macro.h"
#include "libudev.h"
-#define READ_END 0
+#define READ_END 0
#define WRITE_END 1
+#ifndef TEST_PREFIX
+#define TEST_PREFIX ""
+#endif
+
/* avoid (sometimes expensive) calculations of parameters for debug output */
#define udev_log_cond(udev, prio, arg...) \
do { \