diff --git a/src/error.cpp b/src/error.cpp
index 5f26d97..889cd47 100644
--- a/src/error.cpp
+++ b/src/error.cpp
@@ -33,7 +33,7 @@ const char *errstrs[] = {
 #undef ECODE
 
 char*
-dbgsprint(int32 code, ...)
+dbgsprint(uint32 code, ...)
 {
 	va_list ap;
 	static char strbuf[512];
diff --git a/src/rwerror.h b/src/rwerror.h
index 937cc0e..2575626 100644
--- a/src/rwerror.h
+++ b/src/rwerror.h
@@ -10,7 +10,7 @@ void setError(Error *e);
 Error *getError(Error *e);
 
 #define _ERRORCODE(code, ...) code
-char *dbgsprint(int32 code, ...);
+char *dbgsprint(uint32 code, ...);
 
 /* ecode is supposed to be in format "(errorcode, printf-arguments..)" */
 #define RWERROR(ecode) do{          \