diff --git a/lld/ELF/LTO.cpp b/lld/ELF/LTO.cpp
index 600a1036110c..2334db36ebd5 100644
--- a/lld/ELF/LTO.cpp
+++ b/lld/ELF/LTO.cpp
@@ -67,7 +67,7 @@ static void runNewCustomLtoPasses(Module &M, TargetMachine &TM) {
 
   // Parse a custom AA pipeline if asked to.
   if (!PB.parseAAPipeline(AA, Config->LtoAAPipeline)) {
-    error("Unable to parse AA pipeline description: " + Config->LtoAAPipeline);
+    error("unable to parse AA pipeline description: " + Config->LtoAAPipeline);
     return;
   }
 
diff --git a/lld/test/ELF/lto/ltopasses-custom.ll b/lld/test/ELF/lto/ltopasses-custom.ll
index 3e982e079fb1..147411aca14c 100644
--- a/lld/test/ELF/lto/ltopasses-custom.ll
+++ b/lld/test/ELF/lto/ltopasses-custom.ll
@@ -28,3 +28,10 @@ define void @barrier() {
 ; RUN:   --lto-newpm-passes=iamnotapass -shared 2>&1 | \
 ; RUN:   FileCheck %s --check-prefix=INVALID
 ; INVALID: unable to parse pass pipeline description: iamnotapass
+
+; Check that invalid AA pipelines are rejected gracefully.
+; RUN: not ld.lld -m elf_x86_64 %t.o -o %t2.so \
+; RUN:   --lto-newpm-passes=globaldce --lto-aa-pipeline=patatino \
+; RUN:   -shared 2>&1 | \
+; RUN:   FileCheck %s --check-prefix=INVALIDAA
+; INVALIDAA: unable to parse AA pipeline description: patatino