diff --git a/mx_mysql.c b/mx_mysql.c
index cd002b3..2d25f55 100644
--- a/mx_mysql.c
+++ b/mx_mysql.c
@@ -765,7 +765,6 @@ static int mx_mysql_real_connect(struct mx_mysql *mysql, const char *host, const
         return 0;
     }
 
-    mx_log_debug("ERROR: mysql_real_connect(): %s", mx__mysql_error(mysql));
     return res;
 }
 
diff --git a/mx_util.c b/mx_util.c
index 0829ae9..5befe06 100644
--- a/mx_util.c
+++ b/mx_util.c
@@ -205,7 +205,6 @@ inline int mx_strtoll(char *str, signed long long int *to)
 int mx_strtoui(char *str, unsigned int *to)
 {
     unsigned long int ul;
-    char *end;
     int res;
 
     assert(str);
@@ -226,7 +225,6 @@ int mx_strtoui(char *str, unsigned int *to)
 int mx_strtou8(char *str, uint8_t *to)
 {
     unsigned long int ul;
-    char *end;
     int res;
 
     assert(str);
@@ -247,7 +245,6 @@ int mx_strtou8(char *str, uint8_t *to)
 int mx_strtou16(char *str, uint16_t *to)
 {
     unsigned long int ul;
-    char *end;
     int res;
 
     assert(str);
@@ -268,7 +265,6 @@ int mx_strtou16(char *str, uint16_t *to)
 int mx_strtou32(char *str, uint32_t *to)
 {
     unsigned long int ul;
-    char *end;
     int res;
 
     assert(str);
@@ -289,7 +285,6 @@ int mx_strtou32(char *str, uint32_t *to)
 int mx_strtou64(char *str, uint64_t *to)
 {
     unsigned long long int ull;
-    char *end;
     int res;
 
     assert(str);
@@ -312,7 +307,6 @@ int mx_strtou64(char *str, uint64_t *to)
 int mx_strtoi(char *str, signed int *to)
 {
     signed long int l;
-    char *end;
     int res;
 
     assert(str);
@@ -333,7 +327,6 @@ int mx_strtoi(char *str, signed int *to)
 int mx_strtoi8(char *str, int8_t *to)
 {
     signed long int l;
-    char *end;
     int res;
 
     assert(str);
@@ -354,7 +347,6 @@ int mx_strtoi8(char *str, int8_t *to)
 int mx_strtoi16(char *str, int16_t *to)
 {
     signed long int l;
-    char *end;
     int res;
 
     assert(str);
@@ -375,7 +367,6 @@ int mx_strtoi16(char *str, int16_t *to)
 int mx_strtoi32(char *str, int32_t *to)
 {
     signed long int l;
-    char *end;
     int res;
 
     assert(str);
@@ -396,7 +387,6 @@ int mx_strtoi32(char *str, int32_t *to)
 int mx_strtoi64(char *str, int64_t *to)
 {
     signed long long int ll;
-    char *end;
     int res;
 
     assert(str);
diff --git a/mx_util.h b/mx_util.h
index 9fac460..64f100c 100644
--- a/mx_util.h
+++ b/mx_util.h
@@ -18,7 +18,7 @@
             do {\
                 if (!(test)) {\
                     errno=(eno);\
-                    mx_log_debug("Assertion '" #test "' failed. Returning -(errno=" #eno ") [%d]: %m", -errno);\
+                    mx_log_emerg("Assertion '" #test "' failed. Returning -(errno=" #eno ") [%d]: %m", -errno);\
                     return -errno;\
                 }\
             } while (0)
@@ -27,7 +27,7 @@
             do {\
                 if (!(test)) {\
                     errno=(eno);\
-                    mx_log_debug("Assertion '" #test "' failed. Setting errno=" #eno " [%d] and returning NULL: %m", errno);\
+                    mx_log_emerg("Assertion '" #test "' failed. Setting errno=" #eno " [%d] and returning NULL: %m", errno);\
                     return NULL;\
                 }\
             } while (0)