Fix option compatibility check
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 939ec6c..accf51e 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -606,7 +606,7 @@
#endif
#if defined(MBEDTLS_PSA_INJECT_ENTROPY) && \
- !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
+ defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
#error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG"
#endif