diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 6d83aeb..53adc49 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -753,7 +753,7 @@
     break;
 
   case Type::LongTyID:
-    if (cast<ConstantInt>(CPV)->isMinValue())
+    if (cast<ConstantInt>(CPV)->isMinValue(CPV->getType()->isSigned()))
       Out << "(/*INT64_MIN*/(-9223372036854775807LL)-1)";
     else
       Out << cast<ConstantInt>(CPV)->getSExtValue() << "ll";
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index 6d83aeb..53adc49 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -753,7 +753,7 @@
     break;
 
   case Type::LongTyID:
-    if (cast<ConstantInt>(CPV)->isMinValue())
+    if (cast<ConstantInt>(CPV)->isMinValue(CPV->getType()->isSigned()))
       Out << "(/*INT64_MIN*/(-9223372036854775807LL)-1)";
     else
       Out << cast<ConstantInt>(CPV)->getSExtValue() << "ll";