diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index 72d3d1d14e93..5f5b6eb82bc7 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -355,7 +355,7 @@ bool MIRParserImpl::initializeCallSiteInfo(
     if (MILoc.Offset >= CallB->size())
       return error(Twine(MF.getName()) +
                    Twine(" call instruction offset out of range.") +
-                   "Unable to reference instruction at bb: " +
+                   " Unable to reference instruction at bb: " +
                    Twine(MILoc.BlockNum) + " at offset:" + Twine(MILoc.Offset));
     auto CallI = std::next(CallB->instr_begin(), MILoc.Offset);
     if (!CallI->isCall(MachineInstr::IgnoreBundle))
diff --git a/llvm/test/CodeGen/MIR/X86/call-site-info-error2.mir b/llvm/test/CodeGen/MIR/X86/call-site-info-error2.mir
index 1d65b3eb5dbf..bd5b2451a8d7 100644
--- a/llvm/test/CodeGen/MIR/X86/call-site-info-error2.mir
+++ b/llvm/test/CodeGen/MIR/X86/call-site-info-error2.mir
@@ -1,5 +1,5 @@
 # RUN: not llc -mtriple=x86_64-- -run-pass none -debug-entry-values %s -o - 2>&1 | FileCheck %s
-# CHECK: baa call instruction offset out of range.Unable to reference instruction at bb: 0 at offset:1
+# CHECK: baa call instruction offset out of range. Unable to reference instruction at bb: 0 at offset:1
 --- |
   define dso_local i32 @baa(i32 %a) local_unnamed_addr {
   entry: