diff --git a/Z80.CPU/v1.0/API/C/emulation/CPU/Z80.h b/Z80.CPU/v1.0/API/C/emulation/CPU/Z80.h
index 8690f07..24b3a23 100644
--- a/Z80.CPU/v1.0/API/C/emulation/CPU/Z80.h
+++ b/Z80.CPU/v1.0/API/C/emulation/CPU/Z80.h
@@ -18,7 +18,7 @@ Released under the terms of the GNU General Public License v3. */
 #endif
 
 #ifndef CPU_Z80_API
-#	if defined(CPU_Z80_USE_STATIC)
+#	ifdef CPU_Z80_USE_STATIC
 #		define CPU_Z80_API
 #	else
 #		define CPU_Z80_API Z_API
diff --git a/Z80.CPU/v1.0/sources/Z80.c b/Z80.CPU/v1.0/sources/Z80.c
index 0678d5c..503582d 100644
--- a/Z80.CPU/v1.0/sources/Z80.c
+++ b/Z80.CPU/v1.0/sources/Z80.c
@@ -9,7 +9,7 @@ Released under the terms of the GNU General Public License v3. */
 
 #include <Z/macros/value.h>
 
-#if defined(CPU_Z80_BUILDING_DYNAMIC)
+#ifdef CPU_Z80_BUILDING_DYNAMIC
 #	define CPU_Z80_API Z_API_EXPORT
 #else
 #	define CPU_Z80_API