diff --git a/src/dynarec/dynarec_arm64_functions.c b/src/dynarec/dynarec_arm64_functions.c
index 5a0e1796..12947c94 100755
--- a/src/dynarec/dynarec_arm64_functions.c
+++ b/src/dynarec/dynarec_arm64_functions.c
@@ -52,6 +52,7 @@ void arm_fyl2x(x64emu_t* emu)
 void arm_ftan(x64emu_t* emu)
 {
     ST0.d = tan(ST0.d);
+    emu->sw.f.F87_C2 = 0;
 }
 void arm_fpatan(x64emu_t* emu)
 {
@@ -80,6 +81,7 @@ void arm_fyl2xp1(x64emu_t* emu)
 void arm_fsincos(x64emu_t* emu)
 {
     sincos(ST1.d, &ST1.d, &ST0.d);
+    emu->sw.f.F87_C2 = 0;
 }
 void arm_frndint(x64emu_t* emu)
 {
@@ -93,10 +95,12 @@ void arm_fscale(x64emu_t* emu)
 void arm_fsin(x64emu_t* emu)
 {
     ST0.d = sin(ST0.d);
+    emu->sw.f.F87_C2 = 0;
 }
 void arm_fcos(x64emu_t* emu)
 {
     ST0.d = cos(ST0.d);
+    emu->sw.f.F87_C2 = 0;
 }
 
 void arm_fbld(x64emu_t* emu, uint8_t* ed)
diff --git a/src/emu/x64rund9.c b/src/emu/x64rund9.c
index 1a892b25..ee255400 100644
--- a/src/emu/x64rund9.c
+++ b/src/emu/x64rund9.c
@@ -185,6 +185,7 @@ int RunD9(x64emu_t *emu, rex_t rex)
         case 0xFB:  /* FSINCOS */
             fpu_do_push(emu);
             sincos(ST1.d, &ST1.d, &ST0.d);
+            emu->sw.f.F87_C2 = 0;
             break;
         case 0xFC:  /* FRNDINT */
             ST0.d = fpu_round(emu, ST0.d);
@@ -196,9 +197,11 @@ int RunD9(x64emu_t *emu, rex_t rex)
             break;
         case 0xFE:  /* FSIN */
             ST0.d = sin(ST0.d);
+            emu->sw.f.F87_C2 = 0;
             break;
         case 0xFF:  /* FCOS */
             ST0.d = cos(ST0.d);
+            emu->sw.f.F87_C2 = 0;
             break;