diff --git a/compiler-rt/lib/builtins/i386/chkstk.S b/compiler-rt/lib/builtins/i386/chkstk.S
index a84bb0ee30070..cdd9a4c2a5752 100644
--- a/compiler-rt/lib/builtins/i386/chkstk.S
+++ b/compiler-rt/lib/builtins/i386/chkstk.S
@@ -14,7 +14,6 @@
 .text
 .balign 4
 DEFINE_COMPILERRT_FUNCTION(_alloca) // _chkstk and _alloca are the same function
-DEFINE_COMPILERRT_FUNCTION(_chkstk)
         push   %ecx
         cmp    $0x1000,%eax
         lea    8(%esp),%ecx     // esp before calling this routine -> ecx
@@ -35,7 +34,6 @@ DEFINE_COMPILERRT_FUNCTION(_chkstk)
         push   (%eax)           // push return address onto the stack
         sub    %esp,%eax        // restore the original value in eax
         ret
-END_COMPILERRT_FUNCTION(_chkstk)
 END_COMPILERRT_FUNCTION(_alloca)
 
 #endif // __i386__
diff --git a/compiler-rt/lib/builtins/x86_64/chkstk.S b/compiler-rt/lib/builtins/x86_64/chkstk.S
index 494ee261193bc..ad7953a116ac7 100644
--- a/compiler-rt/lib/builtins/x86_64/chkstk.S
+++ b/compiler-rt/lib/builtins/x86_64/chkstk.S
@@ -18,7 +18,6 @@
 .text
 .balign 4
 DEFINE_COMPILERRT_FUNCTION(___chkstk_ms)
-DEFINE_COMPILERRT_FUNCTION(__chkstk)
         push   %rcx
         push   %rax
         cmp    $0x1000,%rax
@@ -36,7 +35,6 @@ DEFINE_COMPILERRT_FUNCTION(__chkstk)
         pop    %rax
         pop    %rcx
         ret
-END_COMPILERRT_FUNCTION(__chkstk)
 END_COMPILERRT_FUNCTION(___chkstk_ms)
 
 #endif // __x86_64__