diff --git a/dd.c b/dd.c
index 85cb7f7..c6f3258 100644
--- a/dd.c
+++ b/dd.c
@@ -239,19 +239,19 @@ main(int argc, char *argv[])
 	/* emulate 'dd' argument parsing */
 	for (i = 1; i < argc; ++i) {
 		memset(buf, 0, sizeof(buf));
-		if (sscanf(argv[i], "if=%1023c", buf) == 1)
+		if (sscanf(argv[i], "if=%1023s", buf) == 1)
 			config.in = strdup(buf);
-		else if (sscanf(argv[i], "of=%1023c", buf) == 1)
+		else if (sscanf(argv[i], "of=%1023s", buf) == 1)
 			config.out = strdup(buf);
-		else if (sscanf(argv[i], "skip=%1023c", buf) == 1)
+		else if (sscanf(argv[i], "skip=%1023s", buf) == 1)
 			config.skip = estrtoul(buf, 0);
-		else if (sscanf(argv[i], "seek=%1023c", buf) == 1)
+		else if (sscanf(argv[i], "seek=%1023s", buf) == 1)
 			config.seek = estrtoul(buf, 0);
-		else if (sscanf(argv[i], "count=%1023c", buf) == 1)
+		else if (sscanf(argv[i], "count=%1023s", buf) == 1)
 			config.count = estrtoul(buf, 0);
 		else if (strcmp(argv[i], "direct") == 0)
 			config.direct = 1;
-		else if (sscanf(argv[i], "bs=%1023c", buf) == 1)
+		else if (sscanf(argv[i], "bs=%1023s", buf) == 1)
 			config.bs = estrtoul(buf, 0);
 		else if (strcmp(argv[i], "bs") == 0)
 			config.bs = 0;