diff --git a/cmake/compiler/iar/iccarm-fpu.cmake b/cmake/compiler/iar/iccarm-fpu.cmake
index 2435d77254b..84b01279922 100644
--- a/cmake/compiler/iar/iccarm-fpu.cmake
+++ b/cmake/compiler/iar/iccarm-fpu.cmake
@@ -31,17 +31,19 @@ if(CONFIG_FPU)
       if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
         set(PRECISION_TOKEN _D16)
       else()
-        set(PRECISION_TOKEN -SP)
+        set(PRECISION_TOKEN _SP)
       endif()
 
       set(FPU_FOR_Cortex-M4           FPv4${PRECISION_TOKEN})
       set(FPU_FOR_Cortex-M7           FPv5${PRECISION_TOKEN})
       set(FPU_FOR_Cortex-M33          FPv5${PRECISION_TOKEN})
       set(FPU_FOR_Cortex-M33.no_dsp   FPv5${PRECISION_TOKEN})
-      set(FPU_FOR_Cortex-M55          auto)
-      set(FPU_FOR_Cortex-M55.no_mve   auto)
-      # We don't have this one?
-      set(FPU_FOR_Cortex-M55.no_dsp   auto)
+      set(FPU_FOR_Cortex-M55          FPv5${PRECISION_TOKEN})
+      set(FPU_FOR_Cortex-M55.no_mve   FPv5${PRECISION_TOKEN})
+      set(FPU_FOR_Cortex-M55.no_dsp   FPv5${PRECISION_TOKEN})
+      set(FPU_FOR_Cortex-M85          FPv5${PRECISION_TOKEN})
+      set(FPU_FOR_Cortex-M85.no_mve   FPv5${PRECISION_TOKEN})
+      set(FPU_FOR_Cortex-M85.no_dsp   FPv5${PRECISION_TOKEN})
 
       set(ICCARM_FPU ${FPU_FOR_${ICCARM_CPU}})
     endif()