diff --git a/src/cpufreqd.h b/src/cpufreqd.h
index 9733a5f..8cf5713 100644
--- a/src/cpufreqd.h
+++ b/src/cpufreqd.h
@@ -54,6 +54,12 @@
 #define DEFAULT_VERBOSITY	3
 
 #define MAX_STRING_LEN		255
-#define MAX_PATH_LEN		512
+
+#ifdef HAVE_LIMITS_H
+#  include <limits.h>
+#  define MAX_PATH_LEN		PATH_MAX
+#else
+#  define MAX_PATH_LEN		512
+#endif
 
 #endif /* __CPUFREQD_H__ */