diff --git a/mdbx.h b/mdbx.h
index e2dc6720..4b9fbfb5 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -1554,7 +1554,7 @@ MDBX_DEPRECATED static __inline int MDBX_MAP_RESIZED() {
  * mdbx_strerror_r()  - is thread-safe since uses user-supplied buffer where
  *                      appropriate. The returned string must NOT be modified
  *                      by the application, since it may be pointer to internal
- *                      constatn string. However, there is no restriction if the
+ *                      constant string. However, there is no restriction if the
  *                      returned string points to the supplied buffer.
  *
  * [in] err  The error code.
diff --git a/src/core.c b/src/core.c
index a48ac0a8..7bcb093d 100644
--- a/src/core.c
+++ b/src/core.c
@@ -10040,12 +10040,12 @@ __cold int mdbx_is_readahead_reasonable(size_t volume, intptr_t redundancy) {
 #define ENV_USABLE_FLAGS (ENV_CHANGEABLE_FLAGS | ENV_CHANGELESS_FLAGS)
 
 #if ENV_INTERNAL_FLAGS & ENV_USABLE_FLAGS
-#error "Opps, some flags overlapped or wrong"
+#error "Oops, some flags overlapped or wrong"
 #endif
 
 #if (MDBX_ACCEDE | MDBX_CREATE) != ((DB_USABLE_FLAGS | DB_INTERNAL_FLAGS) &    \
                                     (ENV_USABLE_FLAGS | ENV_INTERNAL_FLAGS))
-#error "Opps, some flags overlapped or wrong"
+#error "Oops, some flags overlapped or wrong"
 #endif
 
 /* Merge flags and avoid false MDBX_UTTERLY_NOSYNC */
diff --git a/src/internals.h b/src/internals.h
index ac9fad33..5985d7cb 100644
--- a/src/internals.h
+++ b/src/internals.h
@@ -197,7 +197,7 @@ extern LIBMDBX_API const char *const mdbx_sourcery_anchor;
 #define CORE_DBS 2
 #define MAX_DBI (INT16_MAX - CORE_DBS)
 #if MAX_DBI != MDBX_MAX_DBI
-#error "Opps, MAX_DBI != MDBX_MAX_DBI"
+#error "Oops, MAX_DBI != MDBX_MAX_DBI"
 #endif
 
 /* Number of meta pages - also hardcoded elsewhere */
@@ -740,7 +740,7 @@ struct MDBX_txn {
 
 #if (TXN_FLAGS & MDBX_TXN_BEGIN_FLAGS) ||                                      \
     ((MDBX_TXN_BEGIN_FLAGS | TXN_FLAGS) & MDBX_SHRINK_ALLOWED)
-#error "Opps, some flags overlapped or wrong"
+#error "Oops, some flags overlapped or wrong"
 #endif
 
   unsigned mt_flags;
@@ -1315,10 +1315,10 @@ typedef struct MDBX_node {
 #define DB_INTERNAL_FLAGS DB_VALID
 
 #if DB_INTERNAL_FLAGS & DB_USABLE_FLAGS
-#error "Opps, some flags overlapped or wrong"
+#error "Oops, some flags overlapped or wrong"
 #endif
 #if DB_PERSISTENT_FLAGS & ~DB_USABLE_FLAGS
-#error "Opps, some flags overlapped or wrong"
+#error "Oops, some flags overlapped or wrong"
 #endif
 
 /* max number of pages to commit in one writev() call */
diff --git a/test/osal-unix.cc b/test/osal-unix.cc
index a85ce32a..31e05c06 100644
--- a/test/osal-unix.cc
+++ b/test/osal-unix.cc
@@ -26,7 +26,7 @@
 #include <atomic>
 
 #ifndef MDBX_LOCKING
-#error "Opps, MDBX_LOCKING is undefined!"
+#error "Oops, MDBX_LOCKING is undefined!"
 #endif
 
 #if defined(__APPLE__) && (MDBX_LOCKING == MDBX_LOCKING_POSIX2001 ||           \