diff --git a/README.md b/README.md
index 754a00c..15b2b99 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,7 @@ enjoy the magic. In the below examples, I use a simple directory listing.
 ```
 ls -l | nms
 ls -l | nms -a           // Set auto-decrypt flag
+ls -l | nms -s           // Set mask blanks flag
 ls -l | nms -f green     // Set foreground color to green
 ls -l | nms -c           // Clear screen
 nms -v                   // Display version
diff --git a/nms.6 b/nms.6
index 2d41775..10a6676 100644
--- a/nms.6
+++ b/nms.6
@@ -11,6 +11,9 @@ nms [options]
 .B -a
 sets the auto-decrypt flag, decryption sequence starts without requiring a key press.
 .TP
+.B -s
+sets the mask blanks flag. Blank spaces will be encrypted and decrypted.
+.TP
 .B -c
 clear the screen prior to printing any output
 .TP
diff --git a/src/nms.c b/src/nms.c
index df9dd74..c63cd44 100644
--- a/src/nms.c
+++ b/src/nms.c
@@ -19,7 +19,7 @@ int main(int argc, char *argv[]) {
 	char *input = NULL;
 
 	// Processing command arguments
-	while ((o = getopt(argc, argv, "f:acv")) != -1) {
+	while ((o = getopt(argc, argv, "f:ascv")) != -1) {
 		switch (o) {
 			case 'f':
 				nmseffect_set_foregroundcolor(optarg);
@@ -27,6 +27,9 @@ int main(int argc, char *argv[]) {
 			case 'a':
 				nmseffect_set_autodecrypt(1);
 				break;
+            case 's':
+                nmseffect_set_maskblank(1);
+                break;
 			case 'c':
 				nmseffect_set_clearscr(1);
 				break;
diff --git a/src/nmseffect.c b/src/nmseffect.c
index 1b802e5..195d5f1 100644
--- a/src/nmseffect.c
+++ b/src/nmseffect.c
@@ -34,6 +34,7 @@
 // Behavior settings
 static char *returnOpts     = NULL;         // Return option setting
 static int autoDecrypt      = 0;            // Auto-decrypt flag
+static int maskBlank        = 0;            // Mask blank spaces
 static int colorOn          = 1;            // Terminal color flag
 static int inputPositionX   = -1;           // X coordinate for input position
 static int inputPositionY   = -1;           // Y coordinate for input position
@@ -136,10 +137,15 @@ char nmseffect_exec(char *string) {
 		}
 
 		// Set flag if we have a whitespace character
-		if (strlen(list_pointer->source) == 1 && isspace(list_pointer->source[0]))
-			list_pointer->is_space = 1;
-		else
+        if (strlen(list_pointer->source) == 1 && isspace(list_pointer->source[0])) {
+            // If flag is enabled, mask blank spaces as well
+            if (maskBlank && (list_pointer->source[0] == ' '))
+                list_pointer->is_space = 0;
+            else
+                list_pointer->is_space = 1;
+        } else {
 			list_pointer->is_space = 0;
+        }
 
 		// Set initial mask chharacter
 		list_pointer->mask = nmscharset_get_random();
@@ -349,6 +355,18 @@ void nmseffect_set_autodecrypt(int setting) {
 		autoDecrypt = 0;
 }
 
+/*
+ * Set the maskBlank flag according to the true/false value of the
+ * 'setting' argument. When set to true, blank spaces characters
+ * will be masked as well.
+ */
+void nmseffect_set_maskblank(int setting) {
+    if (setting)
+        maskBlank = 1;
+    else
+        maskBlank = 0;
+}
+
 /*
  * Pass the 'setting' argument to the nmstermio module where it will set
  * the clearScr flag according to the true/false value. When set to true,
diff --git a/src/nmseffect.h b/src/nmseffect.h
index 152e2ba..5c04c3d 100644
--- a/src/nmseffect.h
+++ b/src/nmseffect.h
@@ -13,6 +13,7 @@ char nmseffect_exec(char *);
 void nmseffect_set_foregroundcolor(char *);
 void nmseffect_set_returnopts(char *);
 void nmseffect_set_autodecrypt(int);
+void nmseffect_set_maskblank(int);
 void nmseffect_set_clearscr(int);
 void nmseffect_use_color(int);
 void nmseffect_set_input_position(int, int);