diff --git a/src/libsys/gdb_stub.c b/src/libsys/gdb_stub.c
index 2d6a48a..42e4ece 100644
--- a/src/libsys/gdb_stub.c
+++ b/src/libsys/gdb_stub.c
@@ -384,7 +384,7 @@ static int
 hexToInt(char **ptr, unsigned long *intValue)
 {
 	unsigned long numChars = 0;
-	unsigned long hexValue;
+	int hexValue;
 
 	*intValue = 0;