diff --git a/include/pinproc.h b/include/pinproc.h
index 2f465c5..ccc2fe8 100644
--- a/include/pinproc.h
+++ b/include/pinproc.h
@@ -351,7 +351,7 @@ PINPROC_API void PRLogSetCallback(PRLogCallback callback); /**< Replaces the def
 
 PINPROC_API void PRLogSetLevel(PRLogLevel level);
 
-PINPROC_API const char *PRGetLastErrorText();
+PINPROC_API const char *PRGetLastErrorText(void);
 
 /**
  * @defgroup device Device Creation & Deletion
diff --git a/src/pinproc.cpp b/src/pinproc.cpp
index c59313c..3d682ac 100644
--- a/src/pinproc.cpp
+++ b/src/pinproc.cpp
@@ -82,7 +82,7 @@ void PRSetLastErrorText(const char *format, ...)
     PRLog(kPRLogError, "%s\n", lastErrorText);
 }
 
-const char *PRGetLastErrorText()
+const char *PRGetLastErrorText(void)
 {
     return lastErrorText;
 }