diff --git a/lib/Backend/GlobOpt.cpp b/lib/Backend/GlobOpt.cpp
index 459e97cbe00..eaaf260e695 100644
--- a/lib/Backend/GlobOpt.cpp
+++ b/lib/Backend/GlobOpt.cpp
@@ -7507,7 +7507,11 @@ GlobOpt::TypeSpecializeInlineBuiltInBinary(IR::Instr **pInstr, Value *src1Val, V
             if(src1Val->GetValueInfo()->IsLikelyInt() && src2Val->GetValueInfo()->IsLikelyInt())
             {
                 // Compute resulting range info
-                int32 min1, max1, min2, max2, newMin, newMax;
+                int32 min1 = INT32_MIN;
+                int32 max1 = INT32_MAX; 
+                int32 min2 = INT32_MIN;
+                int32 max2 = INT32_MAX;
+                int32 newMin, newMax;
 
                 Assert(this->DoAggressiveIntTypeSpec());
                 src1Val->GetValueInfo()->GetIntValMinMax(&min1, &max1, this->DoAggressiveIntTypeSpec());
diff --git a/lib/Backend/IntBounds.cpp b/lib/Backend/IntBounds.cpp
index 5906a65dfae..845757b270b 100644
--- a/lib/Backend/IntBounds.cpp
+++ b/lib/Backend/IntBounds.cpp
@@ -178,7 +178,7 @@ void IntBounds::SetBound(
 
     // Aggressively merge the constant lower or upper bound of the base value, adjusted by the offset
     ValueInfo const * const baseValueInfo = baseValue->GetValueInfo();
-    int constantBoundBase;
+    int constantBoundBase = 0xCCCCCCCC;
     const bool success =
         Lower
             ? baseValueInfo->TryGetIntConstantLowerBound(&constantBoundBase, true)
@@ -342,7 +342,7 @@ bool IntBounds::IsGreaterThanOrEqualTo(const Value *const value, const int offse
     Assert(value);
 
     ValueInfo const * const valueInfo = value->GetValueInfo();
-    int constantBoundBase;
+    int constantBoundBase = INT32_MAX;
     const bool success = valueInfo->TryGetIntConstantUpperBound(&constantBoundBase, true);
     Assert(success);
     if(IsGreaterThanOrEqualTo(constantBoundBase, offset))
@@ -360,7 +360,7 @@ bool IntBounds::IsLessThanOrEqualTo(const Value *const value, const int offset)
     Assert(value);
 
     ValueInfo const * const valueInfo = value->GetValueInfo();
-    int constantBoundBase;
+    int constantBoundBase = INT32_MIN;
     const bool success = valueInfo->TryGetIntConstantLowerBound(&constantBoundBase, true);
     Assert(success);
     if(IsLessThanOrEqualTo(constantBoundBase, offset))
diff --git a/lib/Backend/Sym.cpp b/lib/Backend/Sym.cpp
index 99c3316a60d..e3759125b27 100644
--- a/lib/Backend/Sym.cpp
+++ b/lib/Backend/Sym.cpp
@@ -572,7 +572,7 @@ StackSym::GetIntConstValue() const
         {
             return Js::TaggedInt::ToInt32(var);
         }
-        int32 value;
+        int32 value = 0xCCCCCCCC;
         const bool isInt32 = Js::JavascriptNumber::TryGetInt32Value(Js::JavascriptNumber::GetValue(var), &value);
         Assert(isInt32);
         return value;
diff --git a/lib/Backend/ValueInfo.cpp b/lib/Backend/ValueInfo.cpp
index 1fbeb4afaae..a06e949e501 100644
--- a/lib/Backend/ValueInfo.cpp
+++ b/lib/Backend/ValueInfo.cpp
@@ -787,7 +787,10 @@ ValueInfo::MergeLikelyIntValueInfo(JitArenaAllocator* alloc, Value *toDataVal, V
 
     if(newValueType.IsInt())
     {
-        int32 min1, max1, min2, max2;
+        int32 min1 = INT32_MIN;
+        int32 max1 = INT32_MAX;
+        int32 min2 = INT32_MIN;
+        int32 max2 = INT32_MAX;
         toDataValueInfo->GetIntValMinMax(&min1, &max1, false);
         fromDataValueInfo->GetIntValMinMax(&min2, &max2, false);
         return ValueInfo::NewIntRangeValueInfo(alloc, min(min1, min2), max(max1, max2), wasNegativeZeroPreventedByBailout);