1 files changed, 4 insertions, 0 deletions
diff --git a/stm/math.c b/stm/math.c
index 8afdc82a64..e75ec1d4b9 100644
--- a/stm/math.c
+++ b/stm/math.c
@@ -18,6 +18,10 @@ typedef union {
     };
 } double_s_t;
 
+double __attribute__((pcs("aapcs"))) __aeabi_i2d(int32_t x) {
+    return (float)x;
+}
+
 double __attribute__((pcs("aapcs"))) __aeabi_f2d(float x) {
     float_s_t fx={0};
     double_s_t dx={0};