diff --git a/rtl/x86_64/mathu.inc b/rtl/x86_64/mathu.inc
index 50e9df5746..36dc41b7b1 100644
--- a/rtl/x86_64/mathu.inc
+++ b/rtl/x86_64/mathu.inc
@@ -57,7 +57,7 @@ function log2(x : float) : float;assembler;nostackframe;
 
 {$define FPC_MATH_HAS_SINCOS}
 {$ifdef FPC_HAS_TYPE_EXTENDED}
-procedure sincos(theta : extended;out sinus,cosinus : extended);assembler;
+procedure sincos(theta : extended;out sinus,cosinus : extended);assembler;nostackframe;
 asm
     fldt theta
     fsincos
@@ -102,7 +102,7 @@ procedure sincos(theta : single;out sinus,cosinus : single);assembler;
 
 {$define FPC_MATH_HAS_DIVMOD}
 {$asmmode intel}
-procedure DivMod(Dividend: Integer; Divisor: Word; var Result, Remainder: Word);assembler;
+procedure DivMod(Dividend: Integer; Divisor: Word; var Result, Remainder: Word);assembler;nostackframe;
 asm
 {$ifdef WIN64}
   mov eax, ecx
@@ -123,7 +123,7 @@ asm
 end;
 
 
-procedure DivMod(Dividend: Integer; Divisor: Word; var Result, Remainder: SmallInt);assembler;
+procedure DivMod(Dividend: Integer; Divisor: Word; var Result, Remainder: SmallInt);assembler;nostackframe;
 asm
 {$ifdef WIN64}
   mov eax, ecx
@@ -144,7 +144,7 @@ asm
 end;
 
 
-procedure DivMod(Dividend: DWord; Divisor: DWord; var Result, Remainder: DWord);assembler;
+procedure DivMod(Dividend: DWord; Divisor: DWord; var Result, Remainder: DWord);assembler;nostackframe;
 asm
 {$ifdef WIN64}
   mov eax, ecx
@@ -164,7 +164,7 @@ asm
 end;
 
 
-procedure DivMod(Dividend: Integer; Divisor: Integer; var Result, Remainder: Integer);assembler;
+procedure DivMod(Dividend: Integer; Divisor: Integer; var Result, Remainder: Integer);assembler;nostackframe;
 asm
 {$ifdef WIN64}
   mov eax, ecx