diff --git a/llvm/lib/IR/DataLayout.cpp b/llvm/lib/IR/DataLayout.cpp
index 9c1dee0cfb7e..c414e80f4104 100644
--- a/llvm/lib/IR/DataLayout.cpp
+++ b/llvm/lib/IR/DataLayout.cpp
@@ -259,6 +259,8 @@ void DataLayout::parseSpecifier(StringRef Desc) {
             "Missing size specification for pointer in datalayout string");
       Split = split(Rest, ':');
       unsigned PointerMemSize = inBytes(getInt(Tok));
+      if (!PointerMemSize)
+        report_fatal_error("Invalid pointer size of 0 bytes");
 
       // ABI alignment.
       if (Rest.empty())
diff --git a/llvm/test/Assembler/invalid-datalayout19.ll b/llvm/test/Assembler/invalid-datalayout19.ll
new file mode 100644
index 000000000000..fc0fc4685209
--- /dev/null
+++ b/llvm/test/Assembler/invalid-datalayout19.ll
@@ -0,0 +1,6 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+target datalayout = "p:0:32:32"
+
+; CHECK: Invalid pointer size of 0 bytes
+