diff --git a/src/app.py b/src/app.py
index a90e273a2..cce0aa51c 100644
--- a/src/app.py
+++ b/src/app.py
@@ -2782,10 +2782,18 @@ def _check_manifest_requirements(
         ram_requirement["runtime"]
     )
 
+    # Some apps have a higher runtime value than build ...
+    if ram_requirement["build"] != "?" and ram_requirement["runtime"] != "?":
+        max_build_runtime = (ram_requirement["build"]
+                            if human_to_binary(ram_requirement["build"]) > human_to_binary(ram_requirement["runtime"])
+                            else ram_requirement["runtime"])
+    else:
+        max_build_runtime = ram_requirement["build"]
+
     yield (
         "ram",
         can_build and can_run,
-        {"current": binary_to_human(ram), "required": ram_requirement["build"]},
+        {"current": binary_to_human(ram), "required": max_build_runtime},
         "app_not_enough_ram",  # i18n: app_not_enough_ram
     )