diff --git a/toolchain/libnotimpl/src/math.c b/toolchain/libnotimpl/src/math.c
index a16ea740e..5bfcb9532 100644
--- a/toolchain/libnotimpl/src/math.c
+++ b/toolchain/libnotimpl/src/math.c
@@ -43,7 +43,7 @@
 #ifdef __STDC__
 	float ceilf(float x)
 #else
-	float rintf(x)
+	float ceilf(x)
 	float x;
 #endif
 {