diff --git a/.flowconfig b/.flowconfig
index 56fc4e48570..f2d217a5261 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -72,6 +72,7 @@ inexact-spread=warn
 unnecessary-invariant=warn
 signature-verification-failure=warn
 deprecated-utility=error
+implicit-inexact-object=error
 
 [strict]
 deprecated-type
diff --git a/.flowconfig.android b/.flowconfig.android
index 348f20c6be7..bbc7d4bb419 100644
--- a/.flowconfig.android
+++ b/.flowconfig.android
@@ -72,6 +72,7 @@ inexact-spread=warn
 unnecessary-invariant=warn
 signature-verification-failure=warn
 deprecated-utility=error
+implicit-inexact-object=error
 
 [strict]
 deprecated-type