diff --git a/browserwindow.c b/browserwindow.c
index 39fbfa9..61241f2 100644
--- a/browserwindow.c
+++ b/browserwindow.c
@@ -215,7 +215,7 @@ void UpdateControlState(void) {
     }
 
     /* Only allow "Mount Disk" to be clicked if there is a disk selected */
-    int currentSelection = NextMember2(0, (Handle)disksListHandle);
+    unsigned currentSelection = NextMember2(0, (Handle)disksListHandle);
     if (currentSelection != 0) {
         if (diskList[currentSelection-1].memPtr == moreResultsString) {
             if (!moreResultsSelected) {
diff --git a/disksearch.c b/disksearch.c
index 6231607..b465e3b 100644
--- a/disksearch.c
+++ b/disksearch.c
@@ -30,7 +30,7 @@
 static Rect diskListRect = {45, 10, 147, 386};
 
 /* Current length in disk list */
-static int diskListLength = 0;
+static unsigned diskListLength = 0;
 
 /* Number of current page of results from server */
 int pageNum;
@@ -50,7 +50,7 @@ void DoSearch(boolean getMore) {
     char *searchURL = NULL;
     enum NetDiskError result = 0;
 
-    int initialDiskListLength = diskListLength;
+    unsigned initialDiskListLength = diskListLength;
 
     WaitCursor();