diff --git a/src/defs.h b/src/defs.h
index b6076cc1..4b045efc 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -327,6 +327,13 @@
 #   define mdbx_func_ "<mdbx_unknown>"
 #endif
 
+#if defined(__GNUC__) || __has_attribute(format)
+#define __printf_args(format_index, first_arg)                                 \
+  __attribute__((format(printf, format_index, first_arg)))
+#else
+#define __printf_args(format_index, first_arg)
+#endif
+
 /*----------------------------------------------------------------------------*/
 
 #if defined(USE_VALGRIND)
diff --git a/test/log.h b/test/log.h
index e97e954c..3e9f9483 100644
--- a/test/log.h
+++ b/test/log.h
@@ -17,16 +17,7 @@
 #include "base.h"
 
 void __noreturn usage(void);
-
-#ifdef __GNUC__
-#define __printf_args(format_index, first_arg)                                 \
-  __attribute__((format(printf, format_index, first_arg)))
-#else
-#define __printf_args(format_index, first_arg)
-#endif
-
 void __noreturn __printf_args(1, 2) failure(const char *fmt, ...);
-
 void __noreturn failure_perror(const char *what, int errnum);
 const char *test_strerror(int errnum);