diff --git a/include/flags.h b/include/flags.h
index 4e414a1..e96bbfe 100644
--- a/include/flags.h
+++ b/include/flags.h
@@ -72,13 +72,13 @@ typedef struct
 //NOTE: Variables were moved to 'flags.c' to force y'all using getters
 
 //GETTERS
-char getEncryptionSeparator();
-unsigned long getKeyLength();
-inputFlags getDefaultFlags(); //THIS GENERATES inputFlags WITH DEFAULT VALUES
-inputFlags getFlags(); //RETURNS USED FLAGS
+char getEncryptionSeparator(void);
+unsigned long getKeyLength(void);
+inputFlags getDefaultFlags(void); //THIS GENERATES inputFlags WITH DEFAULT VALUES
+inputFlags getFlags(void); //RETURNS USED FLAGS
 outputFlags noOutput(boolean exitCode); //SAME AS getDefaultFlags() BUT FOR outputFlags
-encryptionOperation_type_cb getEncryptionOperation(); //RETURNS FUNCTION WHICH IS USED FOR ENCRYPTION & DECRYPTION
-boolean getFlagsChanged();
+encryptionOperation_type_cb getEncryptionOperation(void); //RETURNS FUNCTION WHICH IS USED FOR ENCRYPTION & DECRYPTION
+boolean getFlagsChanged(void);
 
 //SETTERS
 void setEncryptionSeparator(char encryptionSeparatorNew);
diff --git a/include/logger/flags.h b/include/logger/flags.h
index 8fba230..d6c2f81 100644
--- a/include/logger/flags.h
+++ b/include/logger/flags.h
@@ -55,7 +55,7 @@ typedef struct
 } logFlags;
 
 //GETTERS
-logFlags getLogFlags();
+logFlags getLogFlags(void);
 
 //SETTERS
 void setLogFlags(logFlags logFlagsNew);
diff --git a/include/misc.h b/include/misc.h
index 9878c51..be84d06 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -26,7 +26,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 void generateTextKeyChain(char *key, int *textKeyChain, int textKeyChainSize); //GENERATES ARRAY FOR ENCRYPTION/DECRYPTION
 void generateKey(char *key, int keyLength); //GENERATE ENCRYPTION KEY
 void deallocateOutput(outputFlags flags); //DEALLOCATES flags
-boolean checkVersion(); //THIS FUNCTION CHECKS IF LATEST VERSION OF WHY2 IS USED
+boolean checkVersion(void); //THIS FUNCTION CHECKS IF LATEST VERSION OF WHY2 IS USED
 boolean checkKey(char *key); //CHECKS IF KEY IS VALID
 boolean checkText(char *text); //CHECKS IF TEXT IS VALID
 unsigned long countIntLength(int number); //RETURNS LENGTH OF number
diff --git a/src/core/lib/flags.c b/src/core/lib/flags.c
index 7ca026c..d501385 100644
--- a/src/core/lib/flags.c
+++ b/src/core/lib/flags.c
@@ -33,22 +33,22 @@ encryptionOperation_type_cb encryptionOperation_cb = encryptionOperation;
 boolean flagsChanged = 0; //CHANGES TO 1 WHEN U USE setFlags
 
 //GETTERS
-char getEncryptionSeparator()
+char getEncryptionSeparator(void)
 {
     return encryptionSeparator;
 }
 
-unsigned long getKeyLength()
+unsigned long getKeyLength(void)
 {
     return keyLength;
 }
 
-inputFlags getDefaultFlags()
+inputFlags getDefaultFlags(void)
 {
     return DEFAULT_FLAGS;
 }
 
-inputFlags getFlags()
+inputFlags getFlags(void)
 {
     return flags;
 }
@@ -68,12 +68,12 @@ outputFlags noOutput(boolean exitCode)
     return (outputFlags) { emptyText, emptyKey, 0, 0, 0, exitCode };
 }
 
-encryptionOperation_type_cb getEncryptionOperation()
+encryptionOperation_type_cb getEncryptionOperation(void)
 {
     return encryptionOperation_cb;
 }
 
-boolean getFlagsChanged()
+boolean getFlagsChanged(void)
 {
     return flagsChanged;
 }
diff --git a/src/core/lib/misc.c b/src/core/lib/misc.c
index 9193ea3..9a603dd 100644
--- a/src/core/lib/misc.c
+++ b/src/core/lib/misc.c
@@ -87,7 +87,7 @@ char *replaceWord(char *string, char *old, char *new) //CODE FROM: https://www.g
     return result;
 }
 
-boolean checkVersion()
+boolean checkVersion(void)
 {
     if (getFlags().noCheck) return SUCCESS;
 
diff --git a/src/logger/lib/flags.c b/src/logger/lib/flags.c
index 68f9f75..d1eaff2 100644
--- a/src/logger/lib/flags.c
+++ b/src/logger/lib/flags.c
@@ -24,7 +24,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 logFlags flags = { NULL };
 
 //GETTERS
-logFlags getLogFlags()
+logFlags getLogFlags(void)
 {
     return flags;
 }