diff --git a/.clang-tidy b/.clang-tidy
index d141fd9f..5189c670 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1,5 +1,5 @@
 ---
-Checks:          '*,-llvm-header-guard,-hicpp-*,-readability-function-size,-google-readability-todo,-readability-magic-numbers,-cppcoreguidelines-avoid-magic-numbers,-readability-isolate-declaration'
+Checks:          '*,-llvm-header-guard,-hicpp-*,-readability-function-size,-google-readability-todo,-readability-magic-numbers,-cppcoreguidelines-avoid-magic-numbers,-readability-isolate-declaration,-readability-uppercase-literal-suffix'
 WarningsAsErrors: '*'
 HeaderFilterRegex: '.*'
 AnalyzeTemporaryDtors: false
diff --git a/crypto_sign/falcon-1024/clean/sign.c b/crypto_sign/falcon-1024/clean/sign.c
index 9307206e..937d6163 100644
--- a/crypto_sign/falcon-1024/clean/sign.c
+++ b/crypto_sign/falcon-1024/clean/sign.c
@@ -953,7 +953,7 @@ sampler(void *ctx, fpr mu, fpr isigma) {
          *    centered on 0.
          */
         z0 = gaussian0_sampler(&spc->p);
-        b = prng_get_u8(&spc->p) & 1;
+        b = (int)prng_get_u8(&spc->p) & 1;
         z = b + ((b << 1) - 1) * z0;
 
         /*
diff --git a/crypto_sign/falcon-512/clean/sign.c b/crypto_sign/falcon-512/clean/sign.c
index 9fd0fc78..2b84aea5 100644
--- a/crypto_sign/falcon-512/clean/sign.c
+++ b/crypto_sign/falcon-512/clean/sign.c
@@ -953,7 +953,7 @@ sampler(void *ctx, fpr mu, fpr isigma) {
          *    centered on 0.
          */
         z0 = gaussian0_sampler(&spc->p);
-        b = prng_get_u8(&spc->p) & 1;
+        b = (int)prng_get_u8(&spc->p) & 1;
         z = b + ((b << 1) - 1) * z0;
 
         /*