diff --git a/dlls/crypt32/chain.c b/dlls/crypt32/chain.c
index 24bb197f47e..81dd6c4ea40 100644
--- a/dlls/crypt32/chain.c
+++ b/dlls/crypt32/chain.c
@@ -206,7 +206,7 @@ typedef struct _CertificateChain
     LONG ref;
 } CertificateChain, *PCertificateChain;
 
-static inline BOOL WINAPI CRYPT_IsCertificateSelfSigned(PCCERT_CONTEXT cert)
+static inline BOOL CRYPT_IsCertificateSelfSigned(PCCERT_CONTEXT cert)
 {
     return CertCompareCertificateName(cert->dwCertEncodingType,
      &cert->pCertInfo->Subject, &cert->pCertInfo->Issuer);