diff --git a/casadi-bindings.cabal b/casadi-bindings.cabal
--- a/casadi-bindings.cabal
+++ b/casadi-bindings.cabal
@@ -1,5 +1,5 @@
 name:                casadi-bindings
-version:             3.1.0.0
+version:             3.1.0.1
 synopsis:            mid-level bindings to CasADi
 category:            Numerical, Math
 description:
diff --git a/src/Casadi/Overloading.hs b/src/Casadi/Overloading.hs
--- a/src/Casadi/Overloading.hs
+++ b/src/Casadi/Overloading.hs
@@ -15,8 +15,8 @@
 class Fmod a where
   fmod :: a -> a -> a
 
-foreign import ccall unsafe "c_fmod" c_fmod :: CDouble -> CDouble -> CDouble
-foreign import ccall unsafe "c_fmodf" c_fmodf :: CFloat -> CFloat -> CFloat
+foreign import ccall unsafe "math.h fmod" c_fmod :: CDouble -> CDouble -> CDouble
+foreign import ccall unsafe "math.h fmodf" c_fmodf :: CFloat -> CFloat -> CFloat
 instance Fmod Double where fmod x y = realToFrac $ c_fmod (realToFrac x) (realToFrac y)
 instance Fmod Float where fmod x y = realToFrac $ c_fmodf (realToFrac x) (realToFrac y)