diff --git a/reactos/lib/sdk/crt/crt.rbuild b/reactos/lib/sdk/crt/crt.rbuild
index a8cbc9020ad..ba76d8cc0bb 100644
--- a/reactos/lib/sdk/crt/crt.rbuild
+++ b/reactos/lib/sdk/crt/crt.rbuild
@@ -121,6 +121,7 @@
huge_val.c
hypot.c
ldiv.c
+ logf.c
modf.c
rand.c
s_modf.c
diff --git a/reactos/lib/sdk/crt/math/logf.c b/reactos/lib/sdk/crt/math/logf.c
new file mode 100644
index 00000000000..0da1dae909f
--- /dev/null
+++ b/reactos/lib/sdk/crt/math/logf.c
@@ -0,0 +1,11 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the w64 mingw-runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+#include
+
+float logf(float _X)
+{
+ return ((float)log((double)_X));
+}