diff --git a/src/PharoLauncher-Core/PhLVmProviderUntilPharo80.class.st b/src/PharoLauncher-Core/PhLVmProviderUntilPharo80.class.st
index d7367112..7ae18c3e 100644
--- a/src/PharoLauncher-Core/PhLVmProviderUntilPharo80.class.st
+++ b/src/PharoLauncher-Core/PhLVmProviderUntilPharo80.class.st
@@ -31,7 +31,10 @@ PhLVmProviderUntilPharo80 >> downloadPathOSTypeSegment [
 
 { #category : #'private - accessing' }
 PhLVmProviderUntilPharo80 >> imageArchitecture [
-	^ vmManager is64bit ifTrue: [ '64' ] ifFalse: [ '' ]
+	" No 64-bit image before Pharo 6.0"
+	^ (vmManager is64bit and: [ vmManager pharoVersion > '50' ]) 
+		ifTrue: [ '64' ] 
+		ifFalse: [ '' ]
 ]
 
 { #category : #private }
diff --git a/src/PharoLauncher-Tests-Download/PhLVmProviderUntilPharo80Test.class.st b/src/PharoLauncher-Tests-Download/PhLVmProviderUntilPharo80Test.class.st
index 01b6cbed..864c83b1 100644
--- a/src/PharoLauncher-Tests-Download/PhLVmProviderUntilPharo80Test.class.st
+++ b/src/PharoLauncher-Tests-Download/PhLVmProviderUntilPharo80Test.class.st
@@ -25,3 +25,15 @@ PhLVmProviderUntilPharo80Test >> testUrlIsValidAndAvailable [
 	self assert: (url asString includesSubstring: '64').
 	self assert: (ZnEasy head: url) isSuccess
 ]
+
+{ #category : #tests }
+PhLVmProviderUntilPharo80Test >> testUrlIsValidAndAvailableWhenOs64BitAndImageAvailableOnlyIn32Bits [
+	| url vm |
+	vm := (PhLVirtualMachine id: '40-x86').
+	vmProvider := PhLVmProvider for: vm.
+	url := vmProvider url.
+	
+	self assert: (url asString includesSubstring: '40').
+	self deny: (url asString includesSubstring: '64').
+	self assert: (ZnEasy head: url) isSuccess
+]