diff --git a/functions.h b/functions.h
index 6a5079aa4b..36a8e6295b 100644
--- a/functions.h
+++ b/functions.h
@@ -113,9 +113,9 @@ void NORETURN CDECL error(const char *str, ...);
 
 #ifdef RANDOM_DEBUG
 	#define Random() DoRandom(__LINE__, __FILE__)
-	uint32 DoRandom(uint line, char *file);
+	uint32 DoRandom(int line, const char *file);
 	#define RandomRange(max) DoRandomRange(max, __LINE__, __FILE__)
-	uint DoRandomRange(uint max, uint line, char *file);
+	uint DoRandomRange(uint max, int line, const char *file);
 #else
 	uint32 Random(void);
 	uint RandomRange(uint max);
diff --git a/misc.c b/misc.c
index 5979e61e88..2e400248b7 100644
--- a/misc.c
+++ b/misc.c
@@ -29,7 +29,7 @@ static inline uint32 ROR(uint32 x, int n)
 #ifdef RANDOM_DEBUG
 #include "network_data.h"
 
-uint32 DoRandom(uint line, char *file)
+uint32 DoRandom(int line, const char *file)
 #else
 uint32 Random(void)
 #endif
@@ -61,7 +61,7 @@ uint32 Random(void)
 }
 
 #ifdef RANDOM_DEBUG
-uint DoRandomRange(uint max, uint line, char *file)
+uint DoRandomRange(uint max, int line, const char *file)
 {
 	return (uint16)DoRandom(line, file) * max >> 16;
 }