diff --git a/oclvanitygen.c b/oclvanitygen.c
index 7aad51d..de0c4ab 100644
--- a/oclvanitygen.c
+++ b/oclvanitygen.c
@@ -80,6 +80,7 @@ version, name);
 }
 
 #define MAX_DEVS 32
+#define MAX_FILE 4
 
 int
 main(int argc, char **argv)
@@ -93,7 +94,6 @@ main(int argc, char **argv)
 	int platformidx = -1, deviceidx = -1;
 	int prompt_password = 0;
 	char *seedfile = NULL;
-	FILE *fp = NULL;
 	char **patterns, *pend;
 	int verbose = 1;
 	int npatterns = 0;
@@ -113,6 +113,13 @@ main(int argc, char **argv)
 	int ndevstrs = 0;
 	int opened = 0;
 
+	FILE *pattfp[MAX_FILE], *fp;
+	int pattfpi[MAX_FILE];
+	int npattfp = 0;
+	int pattstdin = 0;
+
+	int i;
+
 	while ((opt = getopt(argc, argv,
 			     "vqikNTX:eE:p:P:d:w:t:g:b:VSh?f:o:s:D:")) != -1) {
 		switch (opt) {
@@ -229,11 +236,17 @@ main(int argc, char **argv)
 			break;
 		}
 		case 'f':
-			if (fp) {
-				fprintf(stderr, "Multiple files specified\n");
+			if (npattfp >= MAX_FILE) {
+				fprintf(stderr,
+					"Too many input files specified\n");
 				return 1;
 			}
 			if (!strcmp(optarg, "-")) {
+				if (pattstdin) {
+					fprintf(stderr, "ERROR: stdin "
+						"specified multiple times\n");
+					return 1;
+				}
 				fp = stdin;
 			} else {
 				fp = fopen(optarg, "r");
@@ -244,6 +257,9 @@ main(int argc, char **argv)
 					return 1;
 				}
 			}
+			pattfp[npattfp] = fp;
+			pattfpi[npattfp] = caseinsensitive;
+			npattfp++;
 			break;
 		case 'o':
 			if (result_file) {
@@ -301,23 +317,6 @@ main(int argc, char **argv)
 		}
 	}
 
-	if (fp) {
-		if (!vg_read_file(fp, &patterns, &npatterns)) {
-			fprintf(stderr, "Failed to load pattern file\n");
-			return 1;
-		}
-		if (fp != stdin)
-			fclose(fp);
-
-	} else {
-		if (optind >= argc) {
-			usage(argv[0]);
-			return 1;
-		}
-		patterns = &argv[optind];
-		npatterns = argc - optind;
-	}
-
 	if (regex) {
 		vcp = vg_regex_context_new(addrtype, privtype);
 
@@ -335,9 +334,37 @@ main(int argc, char **argv)
 	vcp->vc_output_match = vg_output_match_console;
 	vcp->vc_output_timing = vg_output_timing_console;
 
-	if (!vg_context_add_patterns(vcp, (const char ** const)patterns,
-				     npatterns))
+	if (!npattfp) {
+		if (optind >= argc) {
+			usage(argv[0]);
+			return 1;
+		}
+		patterns = &argv[optind];
+		npatterns = argc - optind;
+
+		if (!vg_context_add_patterns(vcp,
+					     (const char ** const) patterns,
+					     npatterns))
+		return 1;
+	}
+
+	for (i = 0; i < npattfp; i++) {
+		fp = pattfp[i];
+		if (!vg_read_file(fp, &patterns, &npatterns)) {
+			fprintf(stderr, "Failed to load pattern file\n");
+			return 1;
+		}
+		if (fp != stdin)
+			fclose(fp);
+
+		if (!regex)
+			vg_prefix_context_set_case_insensitive(vcp, pattfpi[i]);
+
+		if (!vg_context_add_patterns(vcp,
+					     (const char ** const) patterns,
+					     npatterns))
 		return 1;
+	}
 
 	if (!vcp->vc_npatterns) {
 		fprintf(stderr, "No patterns to search\n");
diff --git a/pattern.c b/pattern.c
index 2f80c24..c332d46 100644
--- a/pattern.c
+++ b/pattern.c
@@ -1210,6 +1210,12 @@ typedef struct _vg_prefix_context_s {
 	int			vcp_caseinsensitive;
 } vg_prefix_context_t;
 
+void
+vg_prefix_context_set_case_insensitive(vg_context_t *vcp, int caseinsensitive)
+{
+	((vg_prefix_context_t *) vcp)->vcp_caseinsensitive = caseinsensitive;
+}
+
 static void
 vg_prefix_context_clear_all_patterns(vg_context_t *vcp)
 {
diff --git a/pattern.h b/pattern.h
index b08ff46..026233a 100644
--- a/pattern.h
+++ b/pattern.h
@@ -139,6 +139,8 @@ extern void vg_context_wait_for_completion(vg_context_t *vcp);
 /* Prefix context methods */
 extern vg_context_t *vg_prefix_context_new(int addrtype, int privtype,
 					   int caseinsensitive);
+extern void vg_prefix_context_set_case_insensitive(vg_context_t *vcp,
+						   int caseinsensitive);
 extern double vg_prefix_get_difficulty(int addrtype, const char *pattern);
 
 /* Regex context methods */
diff --git a/vanitygen.c b/vanitygen.c
index a47e3fc..ebd020d 100644
--- a/vanitygen.c
+++ b/vanitygen.c
@@ -324,6 +324,8 @@ usage(const char *name)
 version, name);
 }
 
+#define MAX_FILE 4
+
 int
 main(int argc, char **argv)
 {
@@ -339,7 +341,6 @@ main(int argc, char **argv)
 	int prompt_password = 0;
 	int opt;
 	char *seedfile = NULL;
-	FILE *fp = NULL;
 	char pwbuf[128];
 	const char *result_file = NULL;
 	const char *key_password = NULL;
@@ -349,6 +350,13 @@ main(int argc, char **argv)
 	vg_context_t *vcp = NULL;
 	EC_POINT *pubkey_base = NULL;
 
+	FILE *pattfp[MAX_FILE], *fp;
+	int pattfpi[MAX_FILE];
+	int npattfp = 0;
+	int pattstdin = 0;
+
+	int i;
+
 	while ((opt = getopt(argc, argv, "vqrikeE:P:NTX:F:t:h?f:o:s:")) != -1) {
 		switch (opt) {
 		case 'v':
@@ -425,12 +433,17 @@ main(int argc, char **argv)
 			}
 			break;
 		case 'f':
-			if (fp) {
+			if (npattfp >= MAX_FILE) {
 				fprintf(stderr,
-					"Multiple files specified\n");
+					"Too many input files specified\n");
 				return 1;
 			}
 			if (!strcmp(optarg, "-")) {
+				if (pattstdin) {
+					fprintf(stderr, "ERROR: stdin "
+						"specified multiple times\n");
+					return 1;
+				}
 				fp = stdin;
 			} else {
 				fp = fopen(optarg, "r");
@@ -441,6 +454,9 @@ main(int argc, char **argv)
 					return 1;
 				}
 			}
+			pattfp[npattfp] = fp;
+			pattfpi[npattfp] = caseinsensitive;
+			npattfp++;
 			break;
 		case 'o':
 			if (result_file) {
@@ -510,23 +526,6 @@ main(int argc, char **argv)
 		}
 	}
 
-	if (fp) {
-		if (!vg_read_file(fp, &patterns, &npatterns)) {
-			fprintf(stderr, "Failed to load pattern file\n");
-			return 1;
-		}
-		if (fp != stdin)
-			fclose(fp);
-
-	} else {
-		if (optind >= argc) {
-			usage(argv[0]);
-			return 1;
-		}
-		patterns = &argv[optind];
-		npatterns = argc - optind;
-	}
-		
 	if (regex) {
 		vcp = vg_regex_context_new(addrtype, privtype);
 
@@ -545,9 +544,37 @@ main(int argc, char **argv)
 	vcp->vc_output_match = vg_output_match_console;
 	vcp->vc_output_timing = vg_output_timing_console;
 
-	if (!vg_context_add_patterns(vcp, (const char ** const) patterns,
-				     npatterns))
+	if (!npattfp) {
+		if (optind >= argc) {
+			usage(argv[0]);
+			return 1;
+		}
+		patterns = &argv[optind];
+		npatterns = argc - optind;
+
+		if (!vg_context_add_patterns(vcp,
+					     (const char ** const) patterns,
+					     npatterns))
 		return 1;
+	}
+
+	for (i = 0; i < npattfp; i++) {
+		fp = pattfp[i];
+		if (!vg_read_file(fp, &patterns, &npatterns)) {
+			fprintf(stderr, "Failed to load pattern file\n");
+			return 1;
+		}
+		if (fp != stdin)
+			fclose(fp);
+
+		if (!regex)
+			vg_prefix_context_set_case_insensitive(vcp, pattfpi[i]);
+
+		if (!vg_context_add_patterns(vcp,
+					     (const char ** const) patterns,
+					     npatterns))
+		return 1;
+	}
 
 	if (!vcp->vc_npatterns) {
 		fprintf(stderr, "No patterns to search\n");