diff --git a/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py b/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
index cc2ae606b0..835e92f0cd 100644
--- a/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
+++ b/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
@@ -55,7 +55,7 @@ def macroop FSINCOS {
 
 def macroop FPTAN {
     tanfp st(0), st(0)
-    limm ufp1, "double(1)"
+    lfpimm ufp1, 1
     movfp st(-1), ufp1, spm=-1
 };