diff --git a/rts/System/simd_compat.h b/rts/System/simd_compat.h
index a405e02f58..c68b59e348 100644
--- a/rts/System/simd_compat.h
+++ b/rts/System/simd_compat.h
@@ -3,6 +3,19 @@
 
 #ifdef SSE2NEON
     #include "lib/sse2neon/sse2neon.h"
+    // sse2neon leaks <fenv.h>'s FE_XXX macros, which collide with the ones streflop
+    // redefines and trigger a #warning. Undef them here so streflop gets a clean slate.
+    #undef FE_INVALID
+    #undef FE_DENORMAL
+    #undef FE_DIVBYZERO
+    #undef FE_OVERFLOW
+    #undef FE_UNDERFLOW
+    #undef FE_INEXACT
+    #undef FE_ALL_EXCEPT
+    #undef FE_TONEAREST
+    #undef FE_DOWNWARD
+    #undef FE_UPWARD
+    #undef FE_TOWARDZERO
 #else
     #ifdef _MSC_VER
         #include <intrin.h>   // MSVC umbrella