diff --git a/compiler-rt/lib/builtins/absvti2.c b/compiler-rt/lib/builtins/absvti2.c
--- a/compiler-rt/lib/builtins/absvti2.c
+++ b/compiler-rt/lib/builtins/absvti2.c
@@ -20,7 +20,7 @@
 
 COMPILER_RT_ABI ti_int __absvti2(ti_int a) {
   const int N = (int)(sizeof(ti_int) * CHAR_BIT);
-  if (a == ((ti_int)1 << (N - 1)))
+  if (a == (ti_int)((tu_int)1 << (N - 1)))
     compilerrt_abort();
   const ti_int s = a >> (N - 1);
   return (a ^ s) - s;
diff --git a/compiler-rt/lib/builtins/negvti2.c b/compiler-rt/lib/builtins/negvti2.c
--- a/compiler-rt/lib/builtins/negvti2.c
+++ b/compiler-rt/lib/builtins/negvti2.c
@@ -19,7 +19,7 @@
 // Effects: aborts if -a overflows
 
 COMPILER_RT_ABI ti_int __negvti2(ti_int a) {
-  const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT) - 1);
+  const ti_int MIN = (tu_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT) - 1);
   if (a == MIN)
     compilerrt_abort();
   return -a;