diff --git a/include/vmr.h b/include/vmr.h
index 5e841a4..47baf16 100644
--- a/include/vmr.h
+++ b/include/vmr.h
@@ -25,7 +25,7 @@ long set_parameter_float(T_VBVMR_INTERFACE *iVMR, char *param, float val);
 long set_parameter_string(T_VBVMR_INTERFACE *iVMR, char *param, char *s);
 long set_parameters(T_VBVMR_INTERFACE *iVMR, char *command);
 
-bool mdirty(T_VBVMR_INTERFACE *iVMR);
+bool is_mdirty(T_VBVMR_INTERFACE *iVMR);
 long macrobutton_getstatus(T_VBVMR_INTERFACE *iVMR, long n, float *val, long mode);
 long macrobutton_setstatus(T_VBVMR_INTERFACE *iVMR, long n, float val, long mode);
 
diff --git a/src/vmr.c b/src/vmr.c
index 197d7eb..fffb793 100644
--- a/src/vmr.c
+++ b/src/vmr.c
@@ -88,7 +88,7 @@ long set_parameters(T_VBVMR_INTERFACE *iVMR, char *command)
     return iVMR->VBVMR_SetParameters(command);
 }
 
-bool mdirty(T_VBVMR_INTERFACE *iVMR)
+bool is_mdirty(T_VBVMR_INTERFACE *iVMR)
 {
     return iVMR->VBVMR_MacroButton_IsDirty() == 1;
 }