diff --git a/src/ini_file_reader.c b/src/ini_file_reader.c
index 616cbde..68d336c 100644
--- a/src/ini_file_reader.c
+++ b/src/ini_file_reader.c
@@ -1605,10 +1605,7 @@ bool iniGetBoolValue(const char *szSectionName, const char *szItemName, \
 	}
 	else
 	{
-		return  strcasecmp(pValue, "true") == 0 ||
-			strcasecmp(pValue, "yes") == 0 ||
-			strcasecmp(pValue, "on") == 0 ||
-			strcmp(pValue, "1") == 0;
+		return INI_STRING_IS_TRUE(pValue);
 	}
 }
 
diff --git a/src/ini_file_reader.h b/src/ini_file_reader.h
index 2a586ee..412e7ac 100644
--- a/src/ini_file_reader.h
+++ b/src/ini_file_reader.h
@@ -58,6 +58,12 @@ typedef struct
 extern "C" {
 #endif
 
+#define INI_STRING_IS_TRUE(pValue)  \
+    (strcasecmp(pValue, "true") == 0 || \
+     strcasecmp(pValue, "yes") == 0 ||  \
+     strcasecmp(pValue, "on") == 0 ||   \
+     strcmp(pValue, "1") == 0)
+
 int iniSetAnnotationCallBack(AnnotationMap *map, int count);
 void iniDestroyAnnotationCallBack();