diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index 7f7b44b658eba0..19b7ded40402a6 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -561,9 +561,9 @@ bool PPCTargetInfo::initFeatureMap(
   if (!ppcUserFeaturesCheck(Diags, FeaturesVec))
     return false;
 
-  if (!(ArchDefs & ArchDefinePwr9) && (ArchDefs & ArchDefinePpcgr) &&
+  if (!(ArchDefs & ArchDefinePwr7) && (ArchDefs & ArchDefinePpcgr) &&
       llvm::is_contained(FeaturesVec, "+float128")) {
-    // We have __float128 on PPC but not power 9 and above.
+    // We have __float128 on PPC but not pre-VSX targets.
     Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfloat128" << CPU;
     return false;
   }
diff --git a/clang/test/Driver/ppc-f128-support-check.c b/clang/test/Driver/ppc-f128-support-check.c
index 24748905612ff4..616d641f54b967 100644
--- a/clang/test/Driver/ppc-f128-support-check.c
+++ b/clang/test/Driver/ppc-f128-support-check.c
@@ -2,13 +2,17 @@
 // RUN:   -mcpu=pwr9 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
 // RUN:   -mcpu=power9 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
-
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
-// RUN:   -mcpu=pwr8 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128
+// RUN:   -mcpu=pwr8 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
+// RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
+// RUN:   -mcpu=pwr7 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
+// RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
+// RUN:   -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
+
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
-// RUN:   -mcpu=pwr7 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128
+// RUN:   -mcpu=pwr6 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
-// RUN:   -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128
+// RUN:   -mno-vsx -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128
 
 #ifdef __FLOAT128__
 static_assert(false, "__float128 enabled");