diff --git a/icu4c/source/samples/csdet/csdet.c b/icu4c/source/samples/csdet/csdet.c
index c16a74c8cf..b0c89f2859 100644
--- a/icu4c/source/samples/csdet/csdet.c
+++ b/icu4c/source/samples/csdet/csdet.c
@@ -67,5 +67,7 @@ int main(int argc, char *argv[])
 
         ucsdet_close(csd);
     }
+    
+    return 0;
 }