diff --git a/arm-gen.c b/arm-gen.c
index 9aa093e..1ee008f 100644
--- a/arm-gen.c
+++ b/arm-gen.c
@@ -186,6 +186,9 @@ ST_FUNC void arm_init(struct TCCState *s)
     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 
     float_abi = s->float_abi;
+#ifndef TCC_ARM_HARDFLOAT
+    tcc_warning("soft float ABI currently not supported: default to softfp");
+#endif
 }
 #else
 #define func_float_type func_old_type