diff --git a/include/Runtime/w_fmod.h b/include/Runtime/w_fmod.h
deleted file mode 100644
index e1c998d6..00000000
--- a/include/Runtime/w_fmod.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef __W_FMOD_H__
-#define __W_FMOD_H__
-
-#ifndef __cplusplus
-extern "C" {
-#endif
-
-float fmod(float, float);
-
-#ifndef __cplusplus
-}
-#endif
-
-#endif // __W_FMOD_H__
diff --git a/libc/math.h b/libc/math.h
index 28e7ac04..b6165165 100644
--- a/libc/math.h
+++ b/libc/math.h
@@ -67,6 +67,7 @@ extern _INT32 __extended_huge[];
 #define HUGE_VALL (*(long double*)__extended_huge)
 
 double fabs(double x);
+double fmod(double x, double m);
 double sin(double x);
 double cos(double x);
 double atan(double x);
diff --git a/src/MetroidPrime/ScriptObjects/CScriptSpecialFunction.cpp b/src/MetroidPrime/ScriptObjects/CScriptSpecialFunction.cpp
index 7596d0d5..1cd74072 100644
--- a/src/MetroidPrime/ScriptObjects/CScriptSpecialFunction.cpp
+++ b/src/MetroidPrime/ScriptObjects/CScriptSpecialFunction.cpp
@@ -26,7 +26,7 @@
 #include "Kyoto/Math/CVector2i.hpp"
 #include "Kyoto/Math/CloseEnough.hpp"
 
-#include "Runtime/w_fmod.h"
+#include "math.h"
 #include "rstl/math.hpp"
 
 namespace rstl {