diff --git a/src/iniparser.c b/src/iniparser.c
index 72e53af..2945bad 100644
--- a/src/iniparser.c
+++ b/src/iniparser.c
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <fcntl.h>
 
 #include "iniparser.h"
 
@@ -39,6 +40,21 @@
 extern "C" {
 #endif
 
+/* lock INI file */
+static void ini_file_set_lock (FILE *ini_file, unsigned int set_lock)
+{
+	int fd;
+	struct flock lockinfo;
+
+	fd = fileno (ini_file);
+
+	memset (&lockinfo, 0, sizeof (struct flock));
+	lockinfo.l_type = set_lock ? F_WRLCK : F_UNLCK;
+	lockinfo.l_pid = getpid();
+
+	fcntl (fd, F_SETLKW, &lockinfo);
+}
+
 /* strlib.c following */
 
 #define ASCIILINESZ 1024
@@ -532,6 +548,7 @@ void iniparser_dump_ini(dictionary * d, const char * file_name)
 	if (f==NULL)
 		return;
 
+	ini_file_set_lock (f, 1);
     nsec = iniparser_getnsec(d);
     if (nsec<1) {
         /* No section in file: dump all keys as they are */
@@ -560,6 +577,7 @@ void iniparser_dump_ini(dictionary * d, const char * file_name)
 	fprintf(f, "\n");
     }
 
+	ini_file_set_lock (f, 0);
 	fclose(f);
 }
 
@@ -685,6 +703,7 @@ dictionary * iniparser_new(char *ininame)
         return NULL ;
     }
 
+	ini_file_set_lock (ini, 1);
     sec[0]=0;
 
     /*
@@ -720,6 +739,7 @@ dictionary * iniparser_new(char *ininame)
             }
         }
     }
+	ini_file_set_lock (ini, 0);
     fclose(ini);
     return d ;
 }