diff --git a/polly/include/polly/ScopDetection.h b/polly/include/polly/ScopDetection.h
index c674d153ae55..46921cea7030 100644
--- a/polly/include/polly/ScopDetection.h
+++ b/polly/include/polly/ScopDetection.h
@@ -617,6 +617,7 @@ public:
 struct ScopAnalysis : public AnalysisInfoMixin<ScopAnalysis> {
   static AnalysisKey Key;
   using Result = ScopDetection;
+  ScopAnalysis();
   Result run(Function &F, FunctionAnalysisManager &FAM);
 };
 
diff --git a/polly/lib/Analysis/ScopDetection.cpp b/polly/lib/Analysis/ScopDetection.cpp
index 4039811987d4..a2bbb71b3d89 100644
--- a/polly/lib/Analysis/ScopDetection.cpp
+++ b/polly/lib/Analysis/ScopDetection.cpp
@@ -1780,6 +1780,11 @@ ScopDetectionWrapperPass::ScopDetectionWrapperPass() : FunctionPass(ID) {
   if (IgnoreAliasing)
     PollyUseRuntimeAliasChecks = false;
 }
+ScopAnalysis::ScopAnalysis() {
+  // Disable runtime alias checks if we ignore aliasing all together.
+  if (IgnoreAliasing)
+    PollyUseRuntimeAliasChecks = false;
+}
 
 void ScopDetectionWrapperPass::releaseMemory() { Result.reset(); }