diff --git a/stm/math.c b/stm/math.c
index 9197d850c8..8afdc82a64 100644
--- a/stm/math.c
+++ b/stm/math.c
@@ -79,7 +79,7 @@ float ceilf(float x) { return 0.0; }
 float floorf(float x) { return 0.0; }
 float truncf(float x) { return 0.0; }
 float fmodf(float x, float y) { return 0.0; }
-float gammaf(float x) { return 0.0; }
+float tgammaf(float x) { return 0.0; }
 float lgammaf(float x) { return 0.0; }
 float erff(float x) { return 0.0; }
 float erfcf(float x) { return 0.0; }
diff --git a/stmhal/math.c b/stmhal/math.c
index 9197d850c8..8afdc82a64 100644
--- a/stmhal/math.c
+++ b/stmhal/math.c
@@ -79,7 +79,7 @@ float ceilf(float x) { return 0.0; }
 float floorf(float x) { return 0.0; }
 float truncf(float x) { return 0.0; }
 float fmodf(float x, float y) { return 0.0; }
-float gammaf(float x) { return 0.0; }
+float tgammaf(float x) { return 0.0; }
 float lgammaf(float x) { return 0.0; }
 float erff(float x) { return 0.0; }
 float erfcf(float x) { return 0.0; }