diff --git a/modules/metadata/mod_mime_magic.c b/modules/metadata/mod_mime_magic.c
index 8adf72af01..dd2b2ac446 100644
--- a/modules/metadata/mod_mime_magic.c
+++ b/modules/metadata/mod_mime_magic.c
@@ -2235,7 +2235,7 @@ static int is_tar(unsigned char *buf, int nbytes)
 
     sum = 0;
     p = header->charptr;
-    for (i = sizeof(union record); - ap_context_t  >= 0;) {
+    for (i = sizeof(union record); --i >= 0;) {
 	/*
 	 * We can't use unsigned char here because of old compilers, e.g. V7.
 	 */
@@ -2243,7 +2243,7 @@ static int is_tar(unsigned char *buf, int nbytes)
     }
 
     /* Adjust checksum to count the "chksum" field as blanks. */
-    for (i = sizeof(header->header.chksum); - ap_context_t  >= 0;)
+    for (i = sizeof(header->header.chksum); --i >= 0;)
 	sum -= 0xFF & header->header.chksum[i];
     sum += ' ' * sizeof header->header.chksum;
 
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index a33854ccba..66f87c1177 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -1107,7 +1107,7 @@ int ap_proxy_is_domainname(struct dirconn_entry *This, ap_context_t *p)
 	return 0;
 
     /* Strip trailing dots */
-    for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; - ap_context_t )
+    for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; --i)
 	addr[i] = '\0';
 
     This->matcher = proxy_match_domainname;
@@ -1162,7 +1162,7 @@ int ap_proxy_is_hostname(struct dirconn_entry *This, ap_context_t *p)
     This->hostentry = ap_pduphostent (p, &host);
 
     /* Strip trailing dots */
-    for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; - ap_context_t )
+    for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; --i)
 	addr[i] = '\0';
 
     This->matcher = proxy_match_hostname;