diff --git a/updater/install.c b/updater/install.c
index 6a8a6b3..1455557 100644
--- a/updater/install.c
+++ b/updater/install.c
@@ -864,7 +864,7 @@
 
     buffer = malloc(st.st_size+1);
     if (buffer == NULL) {
-        ErrorAbort(state, "%s: failed to alloc %lld bytes", name, st.st_size+1);
+        ErrorAbort(state, "%s: failed to alloc %lld bytes", name, (long long)st.st_size+1);
         goto done;
     }
 
@@ -877,7 +877,7 @@
 
     if (fread(buffer, 1, st.st_size, f) != st.st_size) {
         ErrorAbort(state, "%s: failed to read %lld bytes from %s",
-                   name, st.st_size+1, filename);
+                   name, (long long)st.st_size+1, filename);
         fclose(f);
         goto done;
     }