diff --git a/src/apps/bemail/Header.cpp b/src/apps/bemail/Header.cpp
index fc0016c235..002bff9dde 100644
--- a/src/apps/bemail/Header.cpp
+++ b/src/apps/bemail/Header.cpp
@@ -175,7 +175,7 @@ THeaderView::THeaderView (
 			name << " (" << mime << ")";
 		}
 		msg = new BMessage(kMsgEncoding);
-		int32 convert_id;
+		uint32 convert_id;
 		if ((mime == 0) || (strcasecmp(mime, "UTF-8") != 0)) {
 			convert_id = charset.GetConversionID();
 		} else {
diff --git a/src/apps/bemail/Prefs.cpp b/src/apps/bemail/Prefs.cpp
index 2a63de1596..4a0fbad09f 100644
--- a/src/apps/bemail/Prefs.cpp
+++ b/src/apps/bemail/Prefs.cpp
@@ -894,7 +894,7 @@ TPrefsWindow::BuildEncodingMenu(uint32 encoding)
 			name << " (" << mime << ")";
 		}
 		msg = new BMessage(P_ENC);
-		int convert_id;
+		uint32 convert_id;
 		if ((mime == 0) || (strcasecmp(mime, "UTF-8") != 0)) {
 			convert_id = charset.GetConversionID();
 		} else {