diff --git a/include/interface.h b/include/interface.h
index 44376f0..81873fd 100644
--- a/include/interface.h
+++ b/include/interface.h
@@ -10,6 +10,8 @@
 
 #include "VoicemeeterRemote.h"
 
+#define IS_64_BIT sizeof(void *) == 8
+
 PT_VMR create_interface();
 
 #endif /* __IVMR_H__ */
\ No newline at end of file
diff --git a/src/interface.c b/src/interface.c
index 2f325f0..5b97678 100644
--- a/src/interface.c
+++ b/src/interface.c
@@ -81,7 +81,7 @@ static long initialize_dll_interfaces(PT_VMR vmr)
         return -100;
     }
     // use right dll according to O/S type
-    if (sizeof(void *) == 8)
+    if (IS_64_BIT)
         strncat(dll_fullpath, DLL64_NAME, DLL_FULLPATH_SZ - strlen(DLL64_NAME) - 1);
     else
         strncat(dll_fullpath, DLL32_NAME, DLL_FULLPATH_SZ - strlen(DLL32_NAME) - 1);
diff --git a/src/vmrcli.c b/src/vmrcli.c
index f2ea80e..71cc50b 100644
--- a/src/vmrcli.c
+++ b/src/vmrcli.c
@@ -240,11 +240,11 @@ static void usage()
 static enum kind set_kind(char *kval)
 {
     if (strcmp(kval, "basic") == 0)
-        return sizeof(void *) == 8 ? BASICX64 : BASIC;
+        return IS_64_BIT ? BASICX64 : BASIC;
     else if (strcmp(kval, "banana") == 0)
-        return sizeof(void *) == 8 ? BANANAX64 : BANANA;
+        return IS_64_BIT ? BANANAX64 : BANANA;
     else if (strcmp(kval, "potato") == 0)
-        return sizeof(void *) == 8 ? POTATOX64 : POTATO;
+        return IS_64_BIT ? POTATOX64 : POTATO;
     else
         return UNKNOWN;
 }