diff --git a/config.h.in b/config.h.in
index 5db5667..392d9b0 100644
--- a/config.h.in
+++ b/config.h.in
@@ -6,6 +6,9 @@
 /* Define to 1 if the system has the `constructor' function attribute */
 #undef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
 
+/* Define to 1 if the system has the `format' function attribute */
+#undef HAVE_FUNC_ATTRIBUTE_FORMAT
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
diff --git a/configure.ac b/configure.ac
index faacbee..9c3ee02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,8 @@ LT_INIT
 PKG_PROG_PKG_CONFIG
 PKG_INSTALLDIR
 AX_COMPILER_FLAGS
-AX_GCC_FUNC_ATTRIBUTE(constructor)
+AX_GCC_FUNC_ATTRIBUTE([constructor])
+AX_GCC_FUNC_ATTRIBUTE([format])
 
 AC_SUBST([PINELOG_CFLAGS])
 
diff --git a/pinelog.c b/pinelog.c
index cf2c5ff..ded5abc 100644
--- a/pinelog.c
+++ b/pinelog.c
@@ -22,7 +22,7 @@
 #endif
 
 #ifndef PINELOG_DEFAULT_LEVEL
-#define PINELOG_DEFAULT_LEVEL LOG_LVL_ERROR
+#define PINELOG_DEFAULT_LEVEL PINELOG_LVL_ERROR
 #endif
 
 /**********************************************************************
@@ -126,7 +126,7 @@ int pinelog_get_level(void)
 
 int pinelog_set_level(int level)
 {
-    if (level < LOG_LVL_NONE || level > LOG_LVL_TRACE) {
+    if (level < PINELOG_LVL_NONE || level > PINELOG_LVL_TRACE) {
         return EINVAL;
     }
 
@@ -147,8 +147,8 @@ void pinelog_log_message(int level, const char *file, int line, const char *fmt,
     }
 
     /* Cap the log level */
-    if (level > LOG_LVL_TRACE) {
-        level = LOG_LVL_TRACE;
+    if (level > PINELOG_LVL_TRACE) {
+        level = PINELOG_LVL_TRACE;
     }
 
     /* Validate and set output stream */
diff --git a/pinelog.h b/pinelog.h
index 367f789..b7bc0ff 100644
--- a/pinelog.h
+++ b/pinelog.h
@@ -18,6 +18,7 @@
 #ifndef LOGGING_H
 #define LOGGING_H
 
+#include "config.h"
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -106,6 +107,10 @@ int pinelog_get_level(void);
  *
  * @returns None
  */
+#if HAVE_FUNC_ATTRIBUTE_FORMAT
+__attribute__((format(printf, 4, 5)))
+#endif
+
 void pinelog_log_message(int level, const char *file, int line, const char *fmt, ...);
 
 #define PINELOG_FATAL(fmt, ...) do { \